Mishneh Torah, Rest on the Tenth of Tishrei 1

Sugya Map

• Issue: The legal nature of Yom Kippur as Shabbat Shabbaton and the mechanics of the issur melacha (prohibition of work) and issur achila (fasting).
• Nafka Mina:
  • Whether the issur melacha on Yom Kippur is structurally identical to Shabbat (allowing for chiluk melachot) or follows the holiday paradigm (single liability).
  • The source of the issur for the "five afflictions" (washing, anointing, etc.): are they de-oraita or de-rabbanan?
  • The obligation of tosefet (adding time): is it chiyuv gavra (on the person) or cheftza (intrinsic to the sanctity of the day)?
• Primary Sources: Leviticus 23:32, Numbers 29:7, Yoma 74a, Shabbat 115a, Mishneh Torah, Rest on the Tenth of Tishrei 1.

Text Snapshot

The Rambam opens with: "It is a positive commandment to refrain from all work on the tenth day of the seventh month, as Leviticus 23:32 states: 'It shall be a Sabbath of Sabbaths for you.'"

• Leshon Nuance: Note the Rambam’s transition from Shabbat Shabbaton as a source for the mitzvah aseh of resting to the karet liability for melacha. The Rambam insists that "anyone who performs a labor negates the observance of this positive commandment and violates a negative commandment." This dual-violation framing is essential for the Rambam’s lomdus—the issur is not merely an absence of action, but an active violation of the sanctity mandated by the Torah.

Readings

Ramban’s Structural Integration

The Ramban (Leviticus 23:24) argues that the mo'adim (festivals) are structurally linked. He posits that the shabbaton mentioned regarding Yom Kippur serves as a master key for understanding the issur melacha across all holidays. The chiddush here is that the Torah does not need to repeat the issur for every holiday; rather, the "Sabbath of Sabbaths" language establishes a unified legal category.

The Maggid Mishneh on Tosefet

The Maggid Mishneh notes that the Rambam links the obligation of tosefet (adding time to the fast) strictly to the fast itself, not necessarily to the issur melacha. He highlights a profound chiddush: the chiyuv of tosefet in the Rambam’s view is a chiyuv gavra—a personal obligation to extend the state of affliction. This separates the "sanctity of the day" (which is fixed) from the "obligation of the individual" (which is expansive).

Friction

Kushya: The Lechem Mishneh questions the Rambam’s use of Leviticus 23:32. If Shabbat provides the issur for melacha, and Shabbaton provides the issur for the "five afflictions" (washing, etc.), why does the Rambam link the issur melacha to the entire phrase "Sabbath of Sabbaths"?

Terutz: The Rambam implies a hierarchy of sanctity. The Shabbat component refers to the cessation of the 39 melachot, whereas the Shabbaton component refers to the shvut (rabbinic/extra-biblical prohibitions). By using the full phrase, the Rambam signals that Yom Kippur possesses a dual-layered prohibition: the melacha (Shabbat-level) and the affliction (Shabbaton-level). The terutz is that the "Sabbath of Sabbaths" is not a redundant phrase, but a linguistic fusion of two distinct legal intensities.

Intertext

• Yoma 74b: The Talmudic basis for defining innui (affliction). The Rambam’s reliance on the Oral Tradition here mirrors his approach in Hilchot Shabbat 1:1, where he asserts that the definition of melacha is a matter of tradition despite the absence of explicit definitions in the Torah.
• Shulchan Aruch, Orach Chayim 608: The practical codification of tosefet. While the Rambam views this as a Torah-level obligation, the later poskim (specifically the Mishnah Berurah) refine the scope of this obligation, distinguishing between the melacha of the day and the fasting of the day, reflecting the Maggid Mishneh's earlier distinction.

Psak/Practice

The Rambam’s meta-psak is clear: Yom Kippur is not just a "fast day"; it is an elevated Shabbat. In practice, this means the issurim of muktzeh and the prohibitions on non-labor activities (like trimming vegetables before mid-afternoon) are strictly enforced as Shabbat equivalents. The psak emphasizes that even if an act is not "work," it is forbidden if it compromises the shabbaton—the mandated rest and affliction.

Takeaway

Yom Kippur is the day where the "Sabbath" of the week meets the "Sabbath" of the year. The Rambam teaches that our liability is not just for what we do, but for failing to maintain the total suspension of self-indulgence required by the Torah’s command to "afflict the soul."