✦ ❖ ✦ D A A T · L E V E L 3 — S Y N T H E S I S / R E V I E W ✦ ❖ ✦
Siman 190 — Stains (Ketamim): the Rabbinic Decree, the Ke-Gris Measure, Attributions, and the Heter of Colored Garments
דיני כתמים
The כתם, a Rabbinic decree without הרגשה ; the שיעור כגריס measure ; the place of the stain ; the surfaces שאינו מקבל טומאה ; the תליות ; the heter of בגדי צבעונים ; examination and ספקות ; מי רגלים
Structured review, master grid, recap by 9 families, fast memorization
Source: Shulchan Aroukh, Yoreh De'ah ק״צ — 54 seifim
Nossei kelim: ש״ך (Shach) · ט״ז (Taz) · פתחי תשובה (Pithei Teshuva) · סדרי טהרה (Sidrei Tahara) · חכמת אדם (Hokhmat Adam)
Compiled by: הרב יוסף חיים סממה · DAAT
For students who have mastered Levels 1 and 2
daattorah.com
📑 Outline of the synthesis
- The axiom: the כתם is a Rabbinic decree — hence many leniencies
- The 3 reflex questions: surface · size · attribution
- The master grid: the 9 families of the siman
- The 5 golden rules
- Mnemonic — the "KETEM / כתם" memory aid
- The 4 classic pitfalls
- Recap by 9 families — covering the 54 seifim
- Final flashcard
1. The axiom: the כתם is a Rabbinic decree — hence many leniencies
The starting point:
In siman 183, the impurity of the נדה is de-oraita: only the הרגשה (the sensation of the flow) renders טמאה by Torah law. In siman 190 the register changes: the Sages decreed (גזרה) over the כתם — a blood stain found on the body or a garment without any הרגשה. The woman is then טמאה mi-derabanan. This is the key distinction from siman 183. And since everything rests on a Rabbinic decree, the whole siman is governed by one principle: ספקא דרבנן לקולא — on a doubt in matters of כתמים, we are lenient. Hence the abundance of leniencies (קולות): a measure (כגריס) below which nothing applies; attributions (תליות) (we attribute the stain to an external cause); and the great heter of בגדי צבעונים.
| Plane | ראייה (siman 183) | כתם (siman 190) |
|---|
| Level of the prohibition | de-oraita | de-rabanan (decree) |
| הרגשה required? | Yes — the הרגשה renders טמא | No — decreed even without הרגשה |
| Regime of doubt | ספקא דאורייתא לחומרא | ספקא דרבנן לקולא → attributions, measure, colored garments |
💡 The marker: first grasp the nature of the matter — a כתם is a Rabbinic decree, not a Torah-level ראייה. That is what opens the door to the siman's many leniencies (measure, place, attributions, colored garments). But "leniency" is not "solitary ruling": the concrete application of a קולא is done with a Rav.
2. The 3 reflex questions
■ ON WHICH SURFACE? (מקבל טומאה / צבעונים) — is the stain on a surface subject to the decree? They decreed neither on what does not receive impurity (floor, toilet seat — שאינו מקבל טומאה), nor on a colored garment (בגדי צבעונים). Exempt surface → טהורה at once.
↓ we look at the size
■ WHAT SIZE? (כגריס ועוד) — does the stain reach the measure of כגריס ועוד (≈ a bean / a square of 9 lentils)? Below it → טהורה (we attribute it to a פשפש, a louse). One does not combine separate drops.
↓ we look at the attribution
■ CAN IT BE ATTRIBUTED? (תליות) — can the stain be attributed (תולה) to a non-uterine cause: a wound (מכה), external blood (butchers' market, kitchen), insects (כינים / פשפשים)? And could the stain have come מן המקור, i.e. at the place where it is, opposite the בית התורפה? If not → טהורה.
⚖ The guiding principle (Rabbinic decree → leniency)
The whole siman flows from the fact that the כתם is de-rabanan. That is why the Shulchan Aroukh multiplies avenues of leniency: a minimal measure, a requirement of place (the stain must have been able to come מן המקור), the exemption of שאינו מקבל טומאה surfaces, external attributions, the heter of בגדי צבעונים, and the combination of doubts (ספק ספיקא). Each is a gateway to טהרה — but it is a Rav who says which one opens.
3. The master grid: the 9 families of the siman
An absolute must to memorize. Basis: Mehaber and Rama throughout the 54 seifim, read with the Taz, the Shach, the Sidrei Tahara and the Hokhmat Adam.
| Family | Key idea | Effect |
|---|
| 1. The foundation (§1-4) |
כתם = Rabbinic decree, without הרגשה ; exemptions תינוקת / שופעת / חזקה |
🟡 טמאה mi-derabanan, except exempt cases |
| 2. שיעור כגריס (§5-8) |
Less than כגריס ועוד → attributed to a louse (כינה) |
🟢 < כגריס → טהורה ; no combining |
| 3. Place / shape (§9, 11-15) |
The stain concerns only where it could have come מן המקור (כנגד בית התורפה) |
🔴 At the right place → טמאה ; elsewhere → תולה |
| 4. שאינו מקבל טומאה (§10) |
Floor, toilet, any surface not receiving impurity |
🟢 No decree → טהורה |
| 5. External attributions |
מכה, external blood, כינים / פשפשים |
🟢 We attribute → טהורה when possible |
| 6. בגדי צבעונים |
They decreed only on white ; color → exempt |
🟢 Major practical heter (colored undergarments) |
| 7. Examination / doubts |
Show the stain to a Rav ; ספק ספיקא ; doubts of origin |
🟡 Often טהורה via doubt — but via a Rav |
| 8. מי רגלים / water |
Stain mixed with urine or water, washed |
🟢 Nuances of טהרה per the mixture |
| 9. Additional laws |
איש שיוצא ממנו דם, borrowed object, special cases |
🟡 Rabbinic decree → more lenient (with a Rav) |
📌 Key reading: facing a stain, ask in order: is the surface subject (מקבל טומאה? colored?), does the size reach כגריס, and can it be attributed (תליה). Three gateways to טהרה even before the doubt. But none opens by self-ruling: the stain is shown to a Rav.
4. The 5 golden rules
- "כתם = Rabbinic decree, without הרגשה." Unlike siman 183 (de-oraita, הרגשה), the כתם is only de-rabanan ; hence the regime of leniency (ספקא דרבנן לקולא).
- "Less than כגריס ועוד → טהור." A stain smaller than כגריס ועוד is attributed to a louse (כינה) ; one does not combine separate drops (§5-8).
- "מן המקור / כנגד בית התורפה." Only what could have come from the womb renders טמא ; the place of the stain (sleeve, waist, מעפורת) is decisive (§9, 11-15).
- "שאינו מקבל טומאה → no decree." The floor, the toilet, any surface not receiving impurity are not subject to it (§10).
- "לא גזרו אלא בלבן" → בגדי צבעונים. They decreed only on white ; a stain on a colored garment does not render טמאה — the basis of the custom of colored undergarments.
5. Mnemonic — the "KETEM / כתם" memory aid
"K-E-T-E-M" — after the כֶּתֶם itself
- Ke-gris: the שיעור כגריס ועוד measure — below it, טהורה (פשפש).
- Emplacement: מן המקור / כנגד בית התורפה — the place decides.
- Teliyot: we attribute to an external cause (מכה, external blood, כינים).
- Exempt surfaces: שאינו מקבל טומאה (floor, toilet) and בגדי צבעונים.
- Marot / doubt: show to a Rav, combine the ספקות (ספק ספיקא).
The ladder of gateways to טהרה (from white to doubt)
- Surface שאינו מקבל טומאה / colored → no decree at all
- Size < כגריס ועוד → טהורה (louse)
- Place not opposite the מקור → tolerated by position
- תליה (wound / external blood / louse) → we attribute if possible
- ספק ספיקא → we combine doubts (with a Rav)
6. The 4 classic pitfalls
❌ Pitfall 1 — Judging a stain alone: the siman's leniencies (כגריס, place, attributions, colored garments, ספק ספיקא) are real, but their application is not a matter of self-assessment. The size (כגריס), the color (cf. siman 188), the location, the nature of the surface — all of these are weighed before a Rav. Never read the leniency of the Rabbinic כתם as a license to rule at home.
❌ Pitfall 2 — Forgetting the heter of בגדי צבעונים: "לא גזרו אלא בלבן" — the decree of the כתם applies only to white. A stain on a colored garment does not render טמאה. Hence the very widespread custom of wearing colored undergarments, which removes most stain problems. Ignoring this heter creates doubts that the halacha specifically sought to avoid (modalities to be settled with a Rav).
❌ Pitfall 3 — Combining separate drops: the measure is כגריס ועוד in one piece ; one does not add up several distinct small stains to reach the measure. Each small drop, taken on its own, is attributed to a louse (תלויה בכינה) as long as it remains below the measure. Believing that a scatter of tiny dots "makes כגריס" is a classic mistake.
❌ Pitfall 4 — Believing every surface is subject: the decree does not apply to what does not receive impurity. A stain on the floor, on the toilet seat, or on any דבר שאינו מקבל טומאה does not render טמאה (§10). Likewise the stain must have been able to come מן המקור: a stain out of reach of the בית התורפה is tolerated by its position.
For the halacha le-ma'aseh, consult your Rav.
7. Recap by 9 families — covering the 54 seifim
| Family (seifim) | Topic | The essential |
|---|
| 1 · §1-4 | The foundation | De-oraita, only the הרגשה renders טמא ; the Sages decreed over the כתם even without הרגשה (טמאה mi-derabanan). Exemptions: תִּינוֹקֶת / קְטַנָּה (before 12 / without 2 שערות) ; שופעת / מזלפת counted as one ראיה ; חזקת ג׳ פעמים (90 days). |
| 2 · §5-8 | שיעור כגריס ועוד | Less than כְּגְרִיס וְעוֹד (≈ a bean, a square of 9 lentils) → טהורה: attributed to a פשפש / כינה (up to כתורמוס for the bug). Separate drops are not combined: each is attributed to a louse. |
| 3 · §9, 11-15 | Place / shape of the stain | Renders טמא only where the stain could have come מִן הַמָּקוֹר (כנגד בית התורפה) ; on the garment, at / below the waistband ; the sleeve, the מעפורת (headcovering), two women sharing one garment — each place has its rule. |
| 4 · §10 | דבר שאינו מקבל טומאה | A stain found on the קַרְקַע (floor), the toilet seat, or any דבר שאינו מקבל טומאה → the decree does not apply: טהורה. |
| 5 · Attributions | Attribution to an external cause | We תּוֹלֶה the stain to: a bleeding wound (מכה) ; דָּם הַבָּא מִבַּחוּץ ("I passed through the butchers' market / handled a bird" — cf. 185) ; כינים / פשפשים. The logic: attribute the כתם to a non-uterine cause when possible. |
| 6 · בגדי צבעונים | The great practical heter | לֹא גָּזְרוּ אֶלָּא בְּלָבָן: the decree applies only to white. A stain on a colored garment (צבעוני) does not render טמאה. Hence the very widespread custom of wearing colored undergarments to avoid most stain problems. |
| 7 · Examination / doubts | Examination & doubts | Show the stain to a Rav: size (כגריס), color (cf. 188), location. Combination of doubts — סְפֵק סְפֵיקָא ; doubts of origin (hers / another's, blood / other). The כתם being de-rabanan → the doubt leans to leniency. |
| 8 · מי רגלים / water | Urine, water, washing | A stain mixed with מֵי רַגְלַיִם (urine) or water, a washed stain, etc.: depending on whether the blood remains recognizable or is diluted, the nuances of טהרה vary. |
| 9 · Additional laws | Special cases & conduct | אִישׁ שֶׁיּוֹצֵא מִמֶּנּוּ דָּם (cf. 187) ; a כתם on a borrowed object ; various situations. Overall principle: the כתם being de-rabanan → we are more lenient (ספקא דרבנן לקולא, attributions) — but the application requires a Rav. |
8. Final flashcard
| Question | Reflex answer | Source |
|---|
| Does a כתם without הרגשה render טמאה? | Yes, but mi-derabanan (decree) — hence the leniencies | Mehaber §1-4 |
| Stain smaller than כגריס? | טהורה: attributed to a louse (כינה) | Mehaber §5-8 |
| Several separate small stains? | Not combined; each attributed to a louse | Mehaber §6-7 |
| Stain out of reach of the בית התורפה? | Tolerated by position (did not come מן המקור) | Mehaber §9, 11-15 |
| Stain on the floor / the toilet? | טהורה: שאינו מקבל טומאה | Mehaber §10 |
| Stain on a colored garment? | טהורה: לא גזרו אלא בלבן (בגדי צבעונים) | Mehaber + Rama |
| Can it be attributed to a wound / external blood? | Yes, we attribute when possible | Mehaber (attributions, cf. 185) |
| Stain doubtful in size / color / place? | Show it to a Rav; ספק ספיקא toward leniency | Aharonim (cf. 188) |
⚖ The reflex in 3 questions
- Which surface? שאינו מקבל טומאה or colored → no decree at all.
- What size, what place? < כגריס → טהורה (louse) ; not מן המקור → tolerated.
- Can it be attributed? Wound / external blood / louse → תליה ; otherwise ספק ספיקא toward leniency.
The כתם being de-rabanan → practice holds many leniencies — but their application requires a Rav. For the halacha le-ma'aseh, consult your Rav.
🎓 Recap of the study path
| Level | Content | Acquired |
|---|
| 🌱 Level 1 — Base |
Text of the 54 seifim, translation, clear tables |
Overall understanding |
| ⚡ Level 2 — Lamdan |
Yesod of כתם de-rabanan vs הרגשה de-oraita, the logic of שיעור כגריס (louse), the hierarchy of attributions, the source of בגדי צבעונים (לא גזרו אלא בלבן) |
In-depth study |
| ✨ Level 3 — Synthesis |
Master grid, golden rules, mnemonic, pitfalls, recap by 9 families |
Practical mastery + review |
| 🏛️ Level 4 — Daat HaRav (Chabad) & Halacha lema'asse |
The Tzemach Tzedek of Lubavitch and the Chabad mesorah ; the psak of the Aharonim (Sidrei Tahara, Hokhmat Adam, Aroukh haShulchan, Taharat haBayit, Shevet haLevi) |
Daat HaRav + halacha lema'asse |
💡 Suggested next steps:
- Re-read Siman ק״צ in the original Choulhan Aroukh (Hebrew) with the Shach and the Taz
- Study the adjacent Simanim: 183 (the נדה de-oraita and the הרגשה), 185 (credibility and external blood), 187 (the bedikot and איש שיוצא ממנו דם), 188 (the מראות, colors of blood), 196 (the הפסק טהרה and the counting)
- Delve into the yesod: why the כתם is de-rabanan, and how it governs the entire lenient regime of the siman
- Discuss personal cases with a Rav (color, size, location, colored garments) — the halacha le-ma'aseh is decided with a Rav
📖 Sources of this siman on Sefaria:
~ ~ ~ ~ ~
DAAT · הרב יוסף חיים סממה
תלמיד חכם · מעביר שיעורים בהלכה ובחסידות
סימן ק״צ · Level 3 — Synthesis / Review · דיני כתמים
daattorah.com