Siman ק״ט · Dry-in-Dry (יבש ביבש): An Unidentifiable Forbidden Piece Is Nullified in the Majority (Chad be-Trei)
Chad be-trei batel, mimah nafshakh, same kind vs different kind, cooking the mixture — to discover and understand
יורה דעה · סימן ק״ט
דִּין יָבֵשׁ בְּיָבֵשׁ שֶׁנִּתְעָרֵב
🌱 Introduction Level · מתחילים
✦ ❖ ✦
A forbidden piece not fit to be served that mixes with others of its own kind, while dry (יבש ביבש) — that is, it does not dissolve but stays whole, only unrecognizable — is nullified in the majority (חד בתרי בטיל), without needing sixty; they may be eaten one by one (מִמַּה נַּפְשָׁךְ), but not all together. But a different kind (שלא במינו) requires sixty; and if one cooks them together, the broth spreads the taste → sixty is needed (which one may add to without transgressing "nullifying a forbidden thing"). Shulchan Arukh, Yoreh De'ah 109 — 2 seifim.
Topic: Dry-in-dry — chad be-trei batel, mimah nafshakh, same kind / different kind, cooking the mixture Source: שולחן ערוך יורה דעה סימן ק״ט
Compiled by: הרב יוסף חיים סממה DAAT · daattorah.com
📑 Study outline
1.The Mehaber's text: the 2 seifim and the glosses of the Rama
2.Context: where this siman sits in the laws of nullification (ביטול)
3.Key concepts: יבש ביבש, חד בתרי בטיל, מִמַּה נַּפְשָׁךְ, same kind / different kind…
4.The table: same kind / different kind / cooked or not
5.The Shach and the Taz: who they are, a few key entries
6.The Rama's gloss (הגה)
7.מִמַּה נַּפְשָׁךְ: the logic of nullification in the majority
8.Modern practical cases: a non-kosher meatball, meat pieces one of which is treif, cooking the mixture
9.Synthesis and comprehension questions
1. The Mehaber's text — the 2 seifim
Siman 109 deals with a fundamental case of nullification (ביטול): a forbidden piece that mixes with permitted pieces, while dry — meaning the forbidden item does not dissolve into a liquid mass, but stays a whole piece that can no longer be told apart from the others. The Mehaber (Rabbi Yosef Karo) lays down the great rule חד בתרי בטיל ("one in two is nullified") and clarifies what happens if one then cooks the mixture. The Rama (Rabbi Moshe Isserles) adds his glosses (הגה) — the stringencies of practice, the difference of kind, and the absence of any distinction between a Toraitic and a Rabbinic prohibition. Let us discover the two seifim.
Seif 1 — Chad be-trei batel for same kind; a different kind requires sixty
A piece not fit to be served (חתיכה שאינה ראויה להתכבד) that mixed with others, of its own kind, dry in dry (יבש ביבש) — meaning that it does not dissolve (אין נבלל), and the forbidden item stands on its own, but mixed in so that it is unrecognizable — one in two is nullified (חד בתרי בטל) [by the majority], and it is permitted; one person may eat them each on its own, but he shall not eat the three together. And some forbid a single person to eat them even one after another. Gloss of the Rama: and so one should act לכתחילה (a priori); and some are stringent (יש מחמירין) to throw one away or to give it to a non-Jew — but this is merely a simple stringency (חומרא בעלמא). All this is when the mixture is of its own kind (מינו במינו); but of a different kind (שלא במינו) and unrecognizable, even dry in dry one needs sixty (Tur in the name of the Sefer haTeruma and many decisors). And there is no difference in all this whether the prohibition is Rabbinic (דרבנן) or Toraitic (דאורייתא) (Beit Yosef). See Siman 122 — if utensils got mixed.
The central idea: when it is dry-in-dry and of the same kind, a forbidden item that is not an impressive piece (אינה ראויה להתכבד) is nullified by a simple majority — even two against one (חד בתרי), with no need for sixty. They may then be eaten each on its own; the only prohibition is to swallow all of them together (the three at once), since one would then surely consume the forbidden item. But a different kind (שלא במינו) — where the forbidden item is of another kind and unrecognizable — requires sixty, even when dry. And the Rama rules: for the law itself as for the stringency of discarding one, there is no difference between דרבנן and דאורייתא.
ראויה להתכבד — "fit to be served": a piece fine enough to be presented to distinguished guests. Such a piece is a davar chashuv (an important thing) that is never nullified, even in a thousand (see simanim 101 and 110). Our siman therefore speaks only of a piece not fit to be served.
Seif 2 — If one cooks the already-nullified mixture
A dry-in-dry mixture already nullified one-in-two: if one cooked them all together, even to eat them each on its own it is forbidden if there is not sixty there, because the broth (רוטב) imparts taste and is absorbed into the pieces [redistributing the forbidden taste throughout the dish]. And if one wants to cook them together and there is not sixty, he may add to them (להרבות עליהם) until there is sixty and cook, and there is here no transgression of "nullifying a forbidden thing (מבטל איסור)" [since each of these pieces is already permitted in itself]. Gloss of the Rama:some say (יש אומרים) that if the mixture became known before they were cooked together, everything is permitted, because they do not become forbidden again once it was already nullified while dry (Tur in the name of the Rosh, and R. Yeruham in the name of the Tosefot — and he writes that this is the essential view (הכי עיקר)); and in a case of loss (הפסד), one may rely on the lenient authorities and permit.
The pivot of the seif: "dry" nullification is fragile. As long as the pieces stay dry and separate, the majority suffices (חד בתרי). But the moment they are cooked together, the broth draws out the forbidden taste and spreads it into all the pieces → one now needs sixty, otherwise everything is forbidden, even eaten piece by piece. The remedy: add permitted matter until there is sixty before cooking — and this is not "nullifying a forbidden thing a priori," since each piece is already permitted. The Rama adopts the leading view: if the mixture was known before cooking, everything stays permitted (once nullified while dry, the prohibition does not return).
2. Context — where this siman sits
The laws of nullification (ביטול) distinguish two main kinds of mixture. When a liquid forbidden item dissolves into a liquid permitted one (לח בלח, Siman 98), or more broadly when taste spreads, one requires sixty. Siman 109 treats the other case: dry-in-dry (יבש ביבש), where the forbidden item stays a whole piece that is simply no longer recognizable. Here the logic changes: one does not measure a diluted taste, one applies the principle אחרי רבים להטות ("follow the majority") — hence chad be-trei, two against one suffices.
The big questions of the siman
Question
Where?
Typical answer
Same kind, dry: how much is needed?
Seif 1
Chad be-trei batel — the majority suffices, no sixty
May one eat them?
Seif 1
One by one yes (mimah nafshakh); all together no
Different kind (שלא במינו)
Seif 1
Even dry, sixty is required
Rabbinic or Toraitic?
Seif 1
No difference: the majority in both cases
If one cooks the mixture
Seif 2
Without sixty → forbidden; remedy: add up to sixty
Mixture known before cooking
Seif 2
All permitted (already nullified, does not return) — Rama
The overarching idea: when dry, the majority governs; when liquid (or cooked), it is taste. As long as the pieces stay dry and of the same kind, two-against-one nullifies. The moment a taste can circulate — a different kind, or cooking in broth — one falls back on the measure of sixty.
3. The key concepts of this siman
To understand Siman 109, one must master a small technical vocabulary that describes how a forbidden piece is nullified in the majority — and when that nullification ceases to hold.
יבש ביבש — "dry in dry": a forbidden item that does not dissolve (אין נבלל), stays a whole piece that "stands on its own" (עומד בעצמו), but mixed with other pieces so that it cannot be recognized. This is the framework of the whole siman — as opposed to לח בלח (liquid in liquid).
חד בתרי בטיל — "one in two is nullified": when dry and of the same kind, it suffices that the permitted matter be the majority — two against one — for the forbidden item to be nullified. One needs no sixty: the principle אחרי רבים להטות (follow the majority) is at work.
מִמַּה נַּפְשָׁךְ — "whichever way you take it": the logic that permits eating the pieces one by one. With each piece eaten: "perhaps this is the permitted one"; and even the last: "the forbidden one was already eaten before." So each on its own is permitted; only swallowing all of them together is forbidden, since one would then surely consume the forbidden item.
מין במינו / שלא במינו — "same kind / different kind": same kind (מין במינו) → chad be-trei, no sixty (being of the same nature, the forbidden item is not betrayed by a taste). Different kind (שלא במינו) → one needs sixty, even when dry, lest one come to cook them and reach a Toraitic prohibition.
מבטל איסור לכתחילה — "nullifying a forbidden thing a priori": in principle one may not add permitted matter in order to drown out a forbidden item. But in seif 2, adding up to sixty is not that transgression: each piece of the mixture is already permitted (the forbidden item was already nullified while dry).
רוטב נותן טעם — "the broth imparts taste": during cooking, the broth draws out the forbidden taste and absorbs it into all the pieces. That is why "dry" nullification no longer suffices once one cooks: one then needs the liquid measure, sixty.
Two regimes, one switch: when dry and of the same kind, one follows the majority (chad be-trei); but the moment a taste can manifest — שלא במינו or בישול (cooking) — one switches to the measure of sixty. The whole siman lies in this passage from number (majority) to taste (sixty).
4. The table — same kind / different kind / cooked
The two seifim sum up into a table. One crosses the kind (same or different) with the state (dry or cooked), and looks at how much is needed.
Situation
Required measure
Result
Same kind, dry (1 forbidden, ≥ 2 permitted)
Simple majority (chad be-trei)
🟢 Nullified; eat one by one, not all together
Different kind, dry
Sixty
🟡 Sixty needed even when dry (decree lest one cook them)
Rabbinic or Toraitic
Majority (chad be-trei) in both
🟢 No difference (Beit Yosef)
One cooks the mixture, without sixty
—
🔴 Forbidden: the broth spreads the taste
One wants to cook: adds up to 60
Sixty (reached by adding)
🟢 Permitted; no מבטל איסור (each already permitted)
Mixture known before cooking
—
🟢 All permitted (already nullified, does not return — Rama)
The logic in one sentence: when dry and of the same kind, two-against-one suffices and one eats piece by piece; but a different kind or cooking brings a taste back, and then only the measure of sixty nullifies.
The Rama's point (seif 2): the leading view (Rosh, Tosefot) is that if the mixture was known before cooking, everything stays permitted even without sixty: what was once nullified "while dry" does not become forbidden again.
5. The Shach and the Taz — the great commentators
In Yoreh De'ah, the Shulchan Arukh is never read alone. Two great commentaries accompany it on every page and structure practical study: the Shach and the Taz. These are the reference nosei kelim in Yoreh De'ah (no Mishna Berura here, which comments only on Orach Chaim).
The Shach (ש״ך) — short for שפתי כהן, Siftei Kohen, by Rabbi Shabtai haCohen (Lithuania, 17th century). It is the reference commentary on Yoreh De'ah, of great analytical depth.
The Taz (ט״ז) — short for טורי זהב, Turei Zahav, by Rabbi David haLevi Segal (Poland, 17th century). Often in dialogue — and sometimes in disagreement — with the Shach.
A key entry from the Taz
Taz s.k. 1 — Chad be-trei batel is the majority (rov)
The Taz explains the yesod of seif 1: חד בתרי בטל is nothing other than the rule of the majority, אחרי רבים להטות. Since this piece is not fit to be served, the Sages did not require sixty: a simple majority nullifies it. The only reservation is a stringency (חומרא) not to eat the three together — for then one would surely consume the forbidden item, whereas mimah nafshakh, piece by piece, each is justified.
A key entry from the Shach
Shach s.k. 7 — the מִמַּה נַּפְשָׁךְ logic (in the name of the Rashba)
The Shach cites the Rashba to explain why each one on its own is permitted, and two-and-one are acceptable, but not all three together: as long as one does not eat the whole mixture at once, one can always say מִמַּה נַּפְשָׁךְ — either this is the permitted one, or the forbidden one has already been eaten. The Shach further notes (s.k. 8) that שלא במינו includes several kinds one of which is treif and unrecognizable, and (s.k. 4) that the forbidden item standing on its own remains "dry" even when cooked in water — but once cooked, one then needs sixty and a majority among the pieces.
One sees the method: the Shach and the Taz do not repeat the Mehaber — they explain the mechanism (the majority, the mimah nafshakh logic) and rule on the details (different kind = sixty; a Rabbinic prohibition does not necessarily require sixty per the Shach). This is exactly what is deepened at the Lamdan and Halakha levels.
6. The Rama's gloss (הגה)
The Rama (Rabbi Moshe Isserles) adds to the Mehaber's text glosses that reflect practice and refine the application. Here are his most notable interventions in our siman.
On seif 1 — the stringency of discarding one
Gloss of the Rama: וכן ראוי לנהוג לכתחלה; ויש מחמירין להשליך אחת מהן או ליתנה לעובד כוכבים, ואינו אלא חומרא בעלמא — "and so one should act a priori; some are stringent to throw one away or to give it to a non-Jew, but this is merely a simple stringency." The Rama thus validates nullification by the majority as the baseline practice, while noting the pious custom — with no force of strict law.
On seif 1 — a different kind and the non-distinction Rabbinic / Toraitic
Gloss of the Rama: אבל שלא במינו ואינו מכירו אפילו יבש ביבש בעינן ששים… ואין חלוק בכל זה בין איסור דרבנן לאיסור דאורייתא — "but a different kind and unrecognizable, even dry in dry one needs sixty… and there is no difference between a Rabbinic and a Toraitic prohibition." Two crucial points: a different kind reintroduces the measure of sixty, and the rule of the majority applies identically to Rabbinic and Toraitic prohibitions.
On seif 2 — known before cooking, all permitted
Gloss of the Rama: ויש אומרים שאם נודע התערובת קודם שנתבשלו יחד הכל מותר, שאין חוזרין ונאסרין כיון שכבר נתבטלו ביובש… והכי עיקר — "if the mixture was known before cooking, everything is permitted, because they do not become forbidden again once they were already nullified while dry… and this is the essential view." The Rama adds that in a case of loss (הפסד), one may rely on the lenient authorities.
The Rama carefully distinguishes the baseline law (the majority nullifies when dry, same kind) from its limits (a different kind → sixty) and its practical nuances (the stringency of discarding one; all permitted if the mixture was known before cooking).
7. מִמַּה נַּפְשָׁךְ — the logic of nullification in the majority
Seif 1 — the conceptual heart of the siman — deserves a pause. Why may one eat the pieces one by one, but never all together?
Everything rests on the מִמַּה נַּפְשָׁךְ ("whichever way you take it") logic. Imagine one forbidden piece mixed with two permitted:
I eat the first: perhaps this is a permitted one → permitted.
I eat the second: perhaps another permitted one; and even if it is the forbidden one, it is nullified in the majority I already have before me.
I eat the last: if it was the forbidden one, it has already been consumed before; if not, it is a permitted one.
At every step I can justify what I am eating. But if I swallow all three together, I surely consume the forbidden item, with no possible nullification: that alone is forbidden.
Way of eating
Permitted?
Why
One by one (one person)
🟢 Yes
Mimah nafshakh at each piece
Two-and-one (in two goes)
🟢 Yes
A majority is always present
All three together
🔴 No
One surely eats the forbidden item
Stringent views: even one after another
🟡 Disputed
"Some forbid"; the Rama acts lema'aseh per the majority
And seif 2 adds the finishing touch: this "dry" nullification is fragile. Cooking the mixture reawakens the forbidden taste (the broth spreads it) → one then needs sixty. But what was known and nullified before cooking does not become forbidden again (Rama, the essential view).
8. Modern practical cases
How do these rules apply in our kitchens today? Here are three common situations illuminated by our siman.
Case 1 — A non-kosher meatball (or cookie) mixed in with identical ones
A non-kosher meatball falls by accident into a dish of identical meatballs (the same kind), still dry and not cooked together — without knowing which one. Seif 1 commands: chad be-trei batel. As long as the kosher meatballs are the majority (at least two for one forbidden), the forbidden item is nullified in the majority, with no need for sixty. They may then be eaten one by one (mimah nafshakh), but not all together in a single mouthful. For the practical halacha, consult your Rav.
Case 2 — Meat pieces, one of which is treif and no longer recognizable
Several pieces of meat, only one of which is treif (forbidden), got mixed while dry and one no longer knows which. If they are of the same kind and the kosher ones are the majority → chad be-trei, one eats them one by one. But if they are of different kinds (שלא במינו) — for instance a mix of various meats — one then needs sixty against the forbidden item, even when dry. And beware: do not cook them together without sixty. For the practical halacha, consult your Rav.
Case 3 — Cooking such a mixture
One has a mixture already nullified while dry (chad be-trei) and wants to make a stew of it. Seif 2 warns: once cooked together without sixty, all the pieces are forbidden, because the broth spreads the forbidden taste — even eaten separately. The remedy: add permitted matter up to sixty before cooking (this is not "nullifying a forbidden thing," each piece being already permitted). And if the mixture was known before cooking, the Rama permits everything (already nullified once). For the practical halacha, consult your Rav.
The thread running through the three cases: before panicking, ask yourself three questions — is it the same kind? is the permitted matter the majority (at least two against one)? are we going to cook them together? As long as it is dry, the same kind and the majority, the majority nullifies; a different kind or cooking brings the measure of sixty back. But the concrete decision always belongs to the Rav, who knows the details of the case.
9. Synthesis of Siman 109
The essence of Siman 109 in a few sentences:
A forbidden piece not fit to be served, mixed while dry with pieces of the same kind, is nullified in the majority — chad be-trei, two against one, no sixty (seif 1).
They may be eaten one by one (mimah nafshakh); not all together. Some are stringent even one after another.
The Rama: this is the practice a priori; the stringency of discarding one is only a simple stringency (חומרא בעלמא).
A different kind (שלא במינו) → one needs sixty, even when dry (a decree lest one cook them).
No difference between a Rabbinic and a Toraitic prohibition: the majority in both (Beit Yosef).
If one cooks the mixture without sixty → forbidden: the broth imparts taste (seif 2).
Remedy: add permitted matter up to sixty — no מבטל איסור (each already permitted).
A mixture known before cooking → all permitted, the prohibition does not return (Rama, the essential view); in a case of loss, one relies on the lenient.
Memory table
Situation
Measure
Dry, same kind, permitted in the majority
🟢 Chad be-trei batel (majority, no 60)
Way of eating
🟡 One by one yes; all together no
Different kind (שלא במינו), dry
🟡 Sixty required
Rabbinic or Toraitic
🟢 No difference (majority)
Cooking the mixture without sixty
🔴 Forbidden (the broth spreads the taste)
Adding up to sixty / known before cooking
🟢 Permitted (no מבטל איסור / already nullified)
Comprehension questions
Check your understanding:
What is יבש ביבש? How does it differ from לח בלח?
Explain חד בתרי בטיל. Why is there no need for sixty when same kind and dry?
What is ראויה להתכבד? Why does our siman deal only with a piece that is not one?
Detail the מִמַּה נַּפְשָׁךְ logic. Why may one eat one by one but not all three together?
Why does שלא במינו require sixty even when dry? (hint: a decree lest one cook them)
Is there a difference between a דרבנן and a דאורייתא prohibition here? What does the Beit Yosef rule?
What happens if one cooks the nullified mixture (seif 2)? Why?
What is the remedy that lets one cook? Why is it not מבטל איסור?
What does the Rama rule if the mixture was known before cooking? What is the essential view?
What do the Taz (s.k. 1) and the Shach (s.k. 7) say about the majority and mimah nafshakh?
To go further
If you want to go deeper into this siman:
📚 Level 2 — Lamdan: the pilpul, the yesod of chad be-trei (rov minyan or rov binyan), the dispute over a different-kind Rabbinic prohibition (Shach / Ran), flour-in-flour = liquid-in-liquid, the kefel-mi-derabanan debate, anchored in the sugyot
✨ Level 3 — Synthesis: the comparative tables (same kind / different kind / cooked), the golden rules and quick memorization of the 2 seifim
⚖️ Level 4 — Halacha lema'aseh: the practical ruling (Shach, Taz, Pri Megadim, Pitchei Teshuva) and contemporary poskim on concrete cases
The sources for this level may be consulted on Sefaria: