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DAAT · LEVEL 1 — INTRODUCTION

Siman רס"ח · 13 Seifim

Errors and omissions in the Shabbos tefilah — to discover and understand
סימן רס"ח
דִּין הַטּוֹעֶה בִּתְפִלַּת שַׁבָּת
🌱 Introductory Level · Beginners
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First approach to Siman רס"ח: full Hebrew text of the Mechaber, fluent English translation, pedagogical explanations of the halachic concepts, modern practical cases, and synthesis.

Topic: Errors and omissions in the Shabbos tefilah
Source: שולחן ערוך אורח חיים סימן רס"ח (13 seifim)

Compiled by: רב יוסף חיים סממה
DAAT · daattorah.com

📑 Plan of the study

1. The Shulchan Aruch text — the 13 seifim of the Mechaber
2. The general context: why this siman, what is the question?
3. The key halachic concepts of this siman
4. Detail of the seifim — one by one
5. The Mishnah Berurah — opening entries
6. The Rama's position — Ashkenazic vs. Sephardic differences
7. Modern practical cases
8. Practical synthesis and rules to remember
9. Comprehension questions

1. The Shulchan Aruch text

Siman רס"ח contains 13 seifim of the Mechaber (Rabbi Yosef Karo) codifying the laws relating to errors and omissions in the Shabbos tefilah.

Seif א — Vaykhulu in the maariv Amidah

דין הטועה בתפלת השבת. ובו יג סעיפים:
אוֹמֵר וַיְכֻלּוּ בִּתְפִלַּת עַרְבִית.
Translation: one recites וַיְכֻלּוּ (Bereishis 2:1–3 — "thus were the heavens and the earth completed...") within the maariv tefilah of Shabbos — more precisely in the middle berachah "אַתָּה קִדַּשְׁתָּ", after "וַיָּנוּחוּ בָהּ". It is the only one of the 4 tefilos of Shabbos (maariv / shacharis "Yismach Moshe" / mussaf "Tikanta Shabbos" / minchah "Atah Echad") that contains it.

Seif ב — Began the weekday Amidah by mistake

אִם טָעָה וְהִתְחִיל תְּפִלַּת הַחוֹל — גּוֹמֵר אוֹתָהּ בְּרָכָה שֶׁנִּזְכַּר בָּהּ שֶׁטָּעָה, וּמַתְחִיל שֶׁל שַׁבָּת. לֹא שְׁנָא נִזְכַּר בְּבִרְכַּת אַתָּה חוֹנֵן, לֹא שְׁנָא נִזְכַּר בְּבִרְכָה אַחַת מִשְּׁאָר הַבְּרָכוֹ', בֵּין בְּעַרְבִי' בֵּין בְּשַׁחֲרִי' מוּסָף וּמִנְחָה. וְיֵשׁ אוֹמְרִים דְּבְמוּסָף פּוֹסֵק אֲפִלּוּ בְּאֶמְצַע בְּרָכָה.
Translation: if one began the weekday Amidah by mistake on Shabbos — he finishes the berachah in progress (where he noticed), then returns to the Shabbos Amidah. It makes no difference whether the error was in "Atah Chonein" or another middle berachah. True for maariv, shacharis, mussaf, and minchah. Exception (י"א): for mussaf, some hold that one stops even in the middle of a berachah.

Seif ג — "Atah" said inadvertently — 2 sub-cases

אִם הָיָה סָבוּר שֶׁהוּא חוֹל וְהִתְחִיל אַדַּעְתָּא דְחוֹל, וּמִיָּד שֶׁאָמַר תֵּיבַת "אַתָּה" נִזְכַּר קוֹדֶם שֶׁאָמַר "חוֹנֵן" — הֲוֵי לֵיהּ הִתְחִיל בְּשֶׁל חוֹל וְגוֹמֵר אוֹתָהּ בְּרָכָה. אֲבָל אִם הָיָה יוֹדֵעַ שֶׁהוּא שַׁבָּת וְשֶׁלֹּא בְּכַוָּנָה הִתְחִיל תֵּיבַת "אַתָּה" — אֲפִלּוּ אִם הוּא בִּתְפִלַּת שַׁחֲרִית שֶׁאֵינָהּ פּוֹתַחַת בְּאַתָּה, אֵינוֹ גּוֹמֵר בִּרְכַּת אַתָּה חוֹנֵן, דְּחָשְׁבִינַן לֵיהּ כְּטָעָה בִּתְפִלַּת שַׁבָּת בֵּין זוֹ לְזוֹ. הגה (רמ"א): דַּהֲרֵי יָכוֹל לוֹמַר "אַתָּה קִדַּשְׁתָּ" אוֹ "אַתָּה אֶחָד" (תרומת הדשן סי' י"ד).
Translation: two cases. (A) Total confusion — he thought it was weekday, said "Atah" and caught himself before "Chonein": he continues "Atah Chonein". (B) Aware but distracted — he knew it was Shabbos, said "Atah" inadvertently: he does not complete "Chonein" — even at shacharis (which does not begin with "Atah"). We regard it as a mere confusion between Shabbos Amidos. Hagahah (Rama): the Mechaber's reasoning — since he can continue with "Atah Kidashta" or "Atah Echad", there is a path that saves the Amidah.

Seif ד — Davened a weekday Amidah without mentioning Shabbos

מִי שֶׁהִתְפַּלֵּל תְּפִלָּה שֶׁל חוֹל בְּשַׁבָּת וְלֹא הִזְכִּיר שֶׁל שַׁבָּת — לֹא יָצָא. וְאִם הִזְכִּיר שֶׁל שַׁבָּת בְּתוֹךְ הַשְּׁמוֹנֶה־עֶשְׂרֵה — אַף עַל פִּי שֶׁלֹּא קָבַע בְּרָכָה לְשַׁבָּת — יָצָא. הגה: וּבְמוּסָף אֲפִלּוּ לֹא אָמַר רַק "וְנַעֲשֶׂה לְפָנֶיךָ אֶת חוֹבוֹתֵינוּ בִּתְמִידֵי יוֹם וּבְקָרְבַּן מוּסָף" — יָצָא (ב"י סי' רפ"ו בשם הרא"ש).
Translation: one who davened the weekday Amidah on Shabbos and did not mention Shabbos — has not fulfilled his obligation. But if he mentioned Shabbos anywhere in the 18 berachos (even without davening a specific berachah) — he has fulfilled. Hagahah (Rama): at mussaf, it suffices to have said "וְנַעֲשֶׂה לְפָנֶיךָ... וּבְקָרְבַּן מוּסָף" to fulfill the obligation.

Seif ה — Threshold of repetition: akar raglav

טָעָה וְהִתְפַּלֵּל שֶׁל חוֹל בְּשַׁבָּת וְלֹא הִזְכִּיר שֶׁל שַׁבָּת — אִם עָקַר רַגְלָיו, חוֹזֵר לָרֹאשׁ. וְאִם לֹא עָקַר רַגְלָיו — אַף עַל פִּי שֶׁסִּיֵּם תְּפִלָּתוֹ, אֵינוֹ חוֹזֵר אֶלָּא לְשֶׁל שַׁבָּת. (וש"צ ששכח של שבת בשחרית עיין סי' קכ"ו.)
Translation: davened the weekday Amidah and forgot to mention Shabbos — conduct depends on when he notices:
• Already moved feet (= 3 steps back already taken) → repeat the entire Amidah in Shabbos form.
• Feet not yet moved (even if he said "Yihyu leratzon") → return directly to the Shabbos berachah, continue the Shabbos Amidah. No full repetition.

Seif ו — Confusion between Shabbos Amidos

הַטּוֹעֶה בִּתְפִלַּת שַׁבָּת וְהֶחֱלִיף שֶׁל זוֹ בְּזוֹ — אֵינוֹ חוֹזֵר. וְיֵשׁ אוֹמְרִים שֶׁאִם הֶחֱלִיף שֶׁל מוּסָף בְּאַחֶרֶת אוֹ אַחֶרֶת בְּשֶׁל מוּסָף — חוֹזֵר.
Translation: one who confused one Shabbos Amidah for another (e.g., "Atah Kidashta" at shacharis instead of "Yismach Moshe") — does not repeat. All Shabbos Amidos are liturgically equivalent. Exception (י"א): if the confusion involves mussaf — he repeats, because mussaf has a specific feature (the additional sacrifice) that must be pronounced.

Seif ז — Public Vaykhulu after maariv

חוֹזְרִים לוֹמַר וַיְכֻלּוּ — מִשּׁוּם יוֹם טוֹב שֶׁחָל לִהְיוֹת בְּשַׁבָּת שֶׁאֵין אוֹמְרִים אוֹתוֹ בִּתְפִלָּה, וְגַם לְהוֹצִיא לְמִי שֶׁאֵינוֹ יוֹדֵעַ. וְאוֹמְרִים אוֹתוֹ בְּקוֹל רָם וּמְעוּמָּד.
Translation: we repeat Vaykhulu publicly, after the maariv Amidah — for two reasons: (1) if Yom Tov falls on Shabbos, it is not said in the tefilah (Yom Tov Amidah) — therefore it must be said afterwards; (2) to be motzi (fulfill on behalf of) those who do not know. It is said aloud, standing (testimony to Creation — Bereishis 2:1).

Seif ח — Magen Avos: the brachah mei'ein sheva

וְאוֹמֵר שְׁלִיחַ צִבּוּר בְּרָכָה אַחַת מֵעֵין שֶׁבַע. וְאֵין הַיָּחִיד אוֹמֵר אוֹתָהּ. הגה: מִיהוּ אִם הַיָּחִיד רוֹצֶה לְהַחְמִיר עַל עַצְמוֹ — יָכוֹל לוֹמְרָהּ בְּלֹא פְּתִיחָה וּבְלֹא חֲתִימָה. וְכֵן נוֹהֲגִין הַצִּבּוּר לְאוֹמְרָהּ עִם שְׁלִיחַ צִבּוּר בְּלֹא פְּתִיחָה וְחֲתִימָה (אבודרהם וכל בו).
Translation: the Shaliach Tzibbur recites one berachah that summarizes the 7 berachos of the Amidah — "מָגֵן אָבוֹת בִּדְבָרוֹ..." through "הַפּוֹרֵשׂ סֻכַּת שָׁלוֹם". An individual does not say it (he has already davened the full Amidah). Hagahah (Rama): an individual wanting to be machmir may say it without פתיחה ("Baruch") and without חתימה. And the minhag of the tzibbur: to say it together with the Shaliach Tzibbur — without פתיחה or חתימה.

Seif ט — Yom Tov-Shabbos: Magen Avos stays pure Shabbos

יוֹם טוֹב שֶׁחָל לִהְיוֹת בְּשַׁבָּת — אֵינוֹ מַזְכִּיר שֶׁל יוֹם טוֹב בִּבְרָכָה מֵעֵין שֶׁבַע. (פירוש: ברכת "אֵל עֶלְיוֹן קוֹנֵה" וכו'.)
Translation: Yom Tov that falls on Shabbos — one does not mention Yom Tov in Magen Avos. This berachah remains purely Shabbos. Reason: it is a "structural summary" of the 7 berachos of Shabbos, not a remembrance of the coinciding day.

Seif י — No Magen Avos at chasanim/aveilim

אֵין אוֹמְרִים בְּרָכָה מֵעֵין שֶׁבַע בְּבֵית חֲתָנִים וְאֲבֵלִים — דְּלֵיכָּא טַעֲמָא דְּמְאַחֲרִין לָבֹא שֶׁיִּהְיוּ נִזּוֹקִין.
Translation: we do not say Magen Avos in a house where one davens at a chasan's (seven days of celebration) or aveil's (shivah/sheloshim) home. Reason: the original rationale (safety of latecomers leaving the isolated shul at night) does not apply — the tefilah takes place in a private home.

Seif יא — Shabbos after Yom Tov: yes Magen Avos

אַף בְּשַׁבָּת שֶׁאַחַר יוֹם טוֹב אוֹמְרִים בְּרָכָה מֵעֵין שֶׁבַע.
Translation: even on Shabbos following Yom Tov, Magen Avos is said normally. One might think the rationale (safety) would not apply — everyone already having arrived for Yom Tov — but the institution has become fixed for every Shabbos.

Seif יב — Silence during Vaykhulu and Magen Avos

אֵין לְדַבֵּר בְּשָׁעָה שֶׁאוֹמְרִים וַיְכֻלּוּ, וְלֹא בְּשָׁעָה שֶׁאוֹמֵר שְׁלִיחַ צִבּוּר בְּרָכָה מֵעֵין שֶׁבַע.
Translation: it is forbidden to speak during Vaykhulu (public, after the Amidah) and during Magen Avos. Both passages require silence and the attention of the kahal.

Seif יג — Magen Avos fulfills obligation for one who didn't daven

אִם הִתְפַּלֵּל שֶׁל חוֹל וְלֹא הִזְכִּיר שֶׁל שַׁבָּת, אוֹ שֶׁלֹּא הִתְפַּלֵּל כְּלָל — וְשָׁמַע מִשְּׁלִיחַ צִבּוּר בְּרָכָה מֵעֵין שֶׁבַע מֵרֹאשׁ וְעַד סוֹף — יָצָא.
Translation: one who davened the weekday Amidah without mentioning Shabbos, or who did not daven at all — if he listens to Magen Avos from beginning to end with intention to fulfill his obligation — he has fulfilled. A unique liturgical power of this berachah.
Overview of the 13 seifim: two coherent halves —
• Seifim 1–6 — handling personal errors in the Shabbos Amidah
• Seifim 7–13 — the public liturgy around maariv (collective Vaykhulu + Magen Avos with its exceptions and its capacity to fulfill the obligation)

2. The general context

The Shabbos Amidah: structure of 7 berachos

The Shabbos Amidah has 7 berachos (instead of the 19 of weekdays — the 13 middle berachos being replaced by a single berachah of קדושת היום). Each tefilah has its own middle berachah:

TefilahMiddle berachahTheme
maarivאַתָּה קִדַּשְׁתָּCreation — Vaykhulu
shacharisיִשְׂמַח מֹשֶׁהGiving of the Torah
mussafתִּכַּנְתָּ שַׁבָּתKorbanos of the Beis HaMikdash
minchahאַתָּה אֶחָדDivine unity, future Shabbos
The fundamental question of the siman: what to do in case of an error within this complex structure (4 distinct middle berachos, different from the 19 weekday berachos)? And: why the institution of "Magen Avos" — an 8th berachah said aloud after the maariv Amidah, whose origin is historical (safety of latecomers)?

Place in Hilchos Shabbos

Siman רס"ח follows siman 267 (liturgical transitions) and precedes 269 (kiddush in the shul) + 270 (Bameh Madlikin). It is the liturgical heart of the Shabbos-tefilah sequence.

3. Key halachic concepts

Concept 1 — עָקַר רַגְלָיו (Akar Raglav): "moved his feet" — i.e., took the 3 steps back that formally close the Amidah. It is the threshold of repetition: as long as one has not moved, one can correct by returning to the Shabbos berachah. Once moved, one must start over.
Concept 2 — בְּרָכָה מֵעֵין שֶׁבַע (brachah mei'ein sheva): "berachah that summarizes the 7" — the 8th berachah said by the Shaliach Tzibbur after the maariv Amidah of Shabbos. Also called "Magen Avos" (first word). Talmudic origin: Shabbos 24b — instituted so that latecomers could finish their tefilah at a reasonable time and exit with the others. Liturgical power: can, on its own, fulfill the obligation of a missed Shabbos Amidah.
Concept 3 — חֲשִׁיבְנָא לֵיהּ כְּטָעָה (regarded as one who confused between Shabbos Amidos): doctrine of seif 3 — if a person knows it is Shabbos but says "Atah" inadvertently, we do not treat his error as a slip toward weekday, but as an internal confusion among the Shabbos Amidos. He may continue with "Atah Kidashta" or "Atah Echad" — thus saving his tefilah without having to repeat "Atah Chonein".
Concept 4 — להוציא את שאינו יודע (Fulfilling the obligation of one who does not know): liturgical rationale for repeating Vaykhulu and saying Magen Avos. Chazal designed certain tefilos in duplicate — silent and aloud — to fulfill the obligation of those who do not master the text or arrived late.

4. Synoptic view of the 13 seifim

SeifThemePractical rule
1Vaykhulu in the AmidahIncluded in "Atah Kidashta" of maariv
2Weekday Amidah started by mistakeFinish the berachah in progress, return to Shabbos
3"Atah" said inadvertentlyTotal confusion: continue "Chonein". Distraction: continue with "Atah Kidashta"/"Atah Echad"
4Weekday Amidah without mentioning ShabbosHas not fulfilled. Unless mentioned anywhere in the 18
5Noticed after finishingFeet moved: start over. Not moved: return to the Shabbos berachah
6Confusion among Shabbos AmidosNo repetition (except mussaf swapped)
7Public Vaykhulu after maarivAloud, standing — for Yom Tov-Shabbos and to be motzi
8Magen Avos — Shaliach Tzibbur aloneYachid: only without פתיחה/חתימה (Rama)
9Yom Tov-Shabbos in Magen AvosNo mention of Yom Tov — Magen Avos stays pure Shabbos
10Magen Avos at chasan/aveilNot said — the rationale (safety) does not apply
11Shabbos after Yom TovMagen Avos said normally (fixed institution)
12Silence during Vaykhulu and Magen AvosForbidden to speak
13Fulfillment by listening to Magen AvosOne who did not daven — if he listens to Magen Avos beginning to end, fulfilled

5. The Mishnah Berurah — opening entries

The Mishnah Berurah of Rabbi Yisrael Meir Kagan (Chofetz Chaim) contains 28 entries on this siman. Here are the opening ones — to better understand the meaning of the seifim:

משנה ברורה (א) — (א) אומר ויכלו - דאמר רב המנונא כל המתפלל ואומר ויכלו כאלו נעשה שותף להקב"ה במעשה בראשית אל תקרי ויכולו אלא ויכלו פירוש הקב"ה והוא. ומ"מ בדיעבד אם לא אמרו אין מחזירין אותו וכ"ש לדידן דאומרים בקידוש ויכלו [פמ"ג]. בנוסח אתה קדשת צריך להפסיק מעט בין לשמך ותכלית כדי שלא יהיה כחוזר למעלה ח"ו וכן בויכלו יפסיק בין אלהים ובין את [א"ר]. המנהג לומר בליל שבת וינוחו בה וביום וינוחו בו ובמנחה וינוחו בם [שכנה"ג…
משנה ברורה (ב) — (ב) גומר וכו' - הטעם הוא דבדין הוא דבעי לצלויי י"ח ברכות בשבת כמו בחול ולהזכיר קדושת היום בעבודה כמו בר"ח וחוש"מ ורק משום כבוד שבת לא אטרחוהו רבנן ותקנו ברכה אחת אמצעית לשבת ולכן בדיעבד שהתחיל הברכה גומרה שהיא ראויה לו מן הדין ואח"כ מתחיל הברכה המיוחדת לשבת:
משנה ברורה (ג) — (ג) של שבת - וה"ה בכל זה לענין יו"ט:

For the full text of the 28 entries, see Sefaria: Mishnah Berurah 268.

6. The Rama's position — 3 הגהות

Hagahah 1 (seif 3) — Why "Atah" is saved even when conscious

The Rama (citing Terumas HaDeshen) makes the reason explicit: "since he can continue with 'Atah Kidashta' or 'Atah Echad'" — the word "Atah" at the start of a berachah is not exclusively "Chonein". Therefore we regard it as an opening compatible with the Shabbos Amidos.

Hagahah 2 (seif 4) — Mussaf fulfills with a minimum

The Rama (citing Beis Yosef + Rosh): if one says only "וְנַעֲשֶׂה לְפָנֶיךָ אֶת חוֹבוֹתֵינוּ בִּתְמִידֵי יוֹם וּבְקָרְבַּן מוּסָף" — that already suffices to mention Shabbos. There is no need to have davened the entire mussaf berachah.

Hagahah 3 (seif 8) — Individual and Magen Avos

The Rama (citing Abudraham and Kol Bo) — an individual may say Magen Avos without פתיחה ("Baruch") and without חתימה. And the widespread minhag: the tzibbur says it together with the Shaliach Tzibbur.

7. Modern practical cases

SituationApplication
Arrived late to maariv and missed the AmidahListen to Magen Avos from beginning to end (seif 13) — fulfills the obligation. Afterwards, daven the Amidah individually if possible.
Davened the weekday Amidah forgetting it is ShabbosSeif 5 — if feet moved, repeat the entire Amidah. Otherwise, return to the Shabbos berachah.
Confused shacharis and minchah (two Shabbos Amidos)Seif 6 — no repetition. The error remains within the Shabbos perimeter.
Tefilah in a wedding home on Friday nightSeif 10 — no Magen Avos. But Vaykhulu still said together.
Pesach or Sukkos falling on Shabbos (first night)Seif 9 — Magen Avos said, without mention of Yom Tov.
Yachid davens at home without a minyan on Friday nightSeif 8 + Hagahah — may say Magen Avos personally, without פתיחה or חתימה.
Noticed an omission after "Yihyu leratzon" but before stepping backSeif 5 — feet not moved yet, so return to the Shabbos berachah.

8. Practical synthesis of the siman

The 6 rules to remember from Siman רס"ח:
  1. 4 Amidos, 4 middle berachos — Atah Kidashta / Yismach Moshe / Tikanta Shabbos / Atah Echad. Confusion among them = no repetition (except mussaf).
  2. Total omission of Shabbos in a weekday Amidah — repetition if feet moved (seif 5).
  3. Vaykhulu after maariv — public, aloud, standing. Including if Yom Tov coincides.
  4. Magen Avos said by the Shaliach Tzibbur alone. Yachid: may whisper without פתיחה/חתימה.
  5. Magen Avos exceptions: chasan/aveil home. But YES on Shabbos after Yom Tov.
  6. Magen Avos fulfills the obligation of one who did not daven (seif 13) — unique liturgical power.

9. Comprehension questions

Check your understanding:
  1. What are the 4 different middle berachos of the 4 Shabbos Amidos?
  2. What does עָקַר רַגְלָיו mean? Why is it the threshold of repetition?
  3. Why do we say Vaykhulu twice — in the maariv Amidah and publicly afterwards?
  4. What is the brachah mei'ein sheva (Magen Avos)? Who says it? What is its unique power?
  5. Why no Magen Avos in a chasan/aveil home?
  6. Why do we say Magen Avos even on Shabbos after Yom Tov?
  7. What 3 הגהות does the Rama add? What point does each summarize?

To go further

If you want to delve deeper into this siman:
Continue the study — next simanSiman 269 →
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סימן רס"ח · Level 1 — Introduction
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