Arukh HaShulchan, Orach Chaim 261:7-14

Sugya Map

• Issue: The halachic source and nature of tosefet Shabbat – is it de'oraita (Torah law) or derabanan (rabbinic)?
• Nafka Mina(s):
  • The obligation of women in tosefet Shabbat.
  • The consequence of performing melacha during the accepted tosefet period (e.g., chiyuv chatat).
• Primary Sources: Vayikra 23:30, Yoma 81b, Rema Orach Chaim 261:2, Arukh HaShulchan Orach Chaim 261:7-14.

Text Snapshot

• Arukh HaShulchan, Orach Chaim 261:13: "ולכן נשים חייבות בתוספת שבת דהוא דין תורה, דכל מצות לא תעשה שאין זמן גרמא נשים חייבות כמבואר בקידושין דף ל"ד ע"א."
• Dikduk/Leshon: The opening "ולכן" ("and therefore") explicitly links the women's obligation back to the Aruch HaShulchan's preceding argument (261:7-8) that tosefet Shabbat is fundamentally de'oraita. The phrasing "דהוא דין תורה" ("for it is a Torah law") unequivocally grounds the obligation in a higher stratum.

Readings

Rema's Foundation

• Rema, Orach Chaim 261:2: "ומיהו נשים נמי חייבות בה, ונוהגין לקבל תוספת שבת עם הדלקת הנרות."
• Chiddush: The Rema states that women are obligated and notes the custom to accept tosefet Shabbat with candle lighting. This sets the stage for the Aruch HaShulchan's deeper dive into the why.

Arukh HaShulchan's Elucidation

• Arukh HaShulchan, Orach Chaim 261:13: "דכל מצות לא תעשה שאין זמן גרמא נשים חייבות כמבואר בקידושין דף ל"ד ע"א."
• Chiddush: The Aruch HaShulchan provides the lamdus behind the Rema's ruling. He grounds women's obligation in the fundamental principle that "all negative commandments that are not time-bound, women are obligated" (Kiddushin 34a). This re-frames tosefet Shabbat not merely as a positive act of addition, but critically as a lo ta'aseh – an injunction against melacha during the sanctified time.

Friction

• Kushya: If tosefet Shabbat is de'oraita, how is it reconciled with the notion that its extent (e.g., chatzi sha'ah) is a rabbinic takana or minhag? This seems to dilute its Torah status.
• Terutz: The Aruch HaShulchan (261:10) clarifies: the de'oraita obligation applies to any amount of time added, even a moment. The chatzi sha'ah is a derabanan enactment (or minhag) to ensure one actually adds, thereby safeguarding the de'oraita principle of tosefet. The core prohibition of melacha once Shabbat is accepted is de'oraita, regardless of the duration.

Intertext

• Yoma 81b: "מנין לתוספת יום הכיפורים שהוא מן התורה? שנאמר: ועניתם את נפשותיכם בתשעה לחדש בערב."
• This gemara is the foundational source for the de'oraita nature of tosefet, initially applied to Yom Kippur, and subsequently extrapolated by the rishonim to Shabbat and other yamim tovim via gezerah shavah or sevara.

Psak/Practice

The Aruch HaShulchan's rigorous analysis solidifies the halachic weight of tosefet Shabbat. For women, this means the common practice of lighting candles and accepting Shabbat early is not merely a minhag or chumra, but a fulfillment of a de'oraita obligation derived from a lo ta'aseh she'ein zman grama. This means performing melacha after one has accepted Shabbat, even prior to shki'ah, incurs the full halachic implications for violating Shabbat melacha.

Takeaway

Tosefet Shabbat is a de'oraita obligation rooted in a lo ta'aseh, binding on all Jews, including women, once Shabbat has been accepted. This elevates early Shabbat acceptance from a mere custom to a serious Torah imperative.