Mishneh Torah, Sabbath 27-29

Sugya Map

• Core Issue: The Biblical vs. Rabbinic status of Tchum Shabbat (Sabbath limits) and the mechanism of its violation.
• Nafka Mina:
  • Whether the 2,000-cubit limit is a de-oraita prohibition (Rambam) or merely a de-rabbanan safeguard (Ramban, Rashba).
  • Applicability of Hivla'at Techumim (merging of boundaries) in cases of unintentional deviation.
  • The status of "Sanctioned Travel" (e.g., saving lives) versus willful violation.
• Primary Sources: Exodus 16:29; Eruvin 17a, 43a, 58a; Mishneh Torah, Sabbath 27-29.

Text Snapshot

• "היוצא חוץ לתחום בשבת לוקה שנאמר 'אל יצא איש ממקומו ביום השביעי'" (Sabbath 27:1).
  • Rambam anchors the prohibition in a lav (negative command), which he classifies as one of the 613 mitzvot (Sefer HaMitzvot, Negative 321).
• "התורה לא פירשה שיעור זה... שנים עשר מיל" (Sabbath 27:1).
  • Rambam distinguishes between the Torah’s limit (12 mil, the encampment size) and the Sages’ limit (2,000 cubits, the city’s pasture land). Note the nuance: 2,000 cubits is a gezeirah (safeguard) to prevent accidental breach of the 12-mil Biblical limit.

Readings

• Rambam (Hilchot Shabbat 27:1): The chiddush here is the rigid categorization of the 12-mil limit as Biblical. Rambam bridges the Jerusalem Talmud and the Babylonian Talmud by arguing that while the 2,000-cubit limit is Rabbinic, it functions as a fence for a Torah-level restriction. This makes the Tchum laws a hybrid of Biblical severity and Rabbinic precision.
• Ohr Sameach (on 27:1): Rabbi Meir Simcha of Dvinsk explores the logical tension: if the 12-mil limit is de-oraita, why does the Talmud imply in Eruvin that it is negotiable? He suggests that the "place" of a person is elastic. By establishing a base (via eruv), the person shifts their center of gravity, effectively moving their "place" within the Torah's permissible bounds.

Friction

The Kushya: If Tchum is de-oraita (12 mil), why does the Talmud (Eruvin 36a) allow Eruv Tchumin to expand the limit by 2,000 cubits? How can a rabbinic eruv (usually a piece of bread) "uproot" a Torah-level restriction on movement?

The Terutz: Rambam (as analyzed by Sha'ar HaMelekh) posits that the Torah defines the "place" of an Israelite as a 12-mil radius. The Sages did not "uproot" this; they defined the method by which one anchors their "place." The Eruv is not a permit to violate the limit; it is a legal declaration of where one’s "place" is currently located. Once the location is fixed, the 12-mil boundary is calculated from that new anchor point. Thus, the Rabbinic institution provides the location, and the Torah provides the perimeter.

Intertext

• Numbers 35:5: The Torah defines the migrash (pasture land) of the Levitical cities as 2,000 cubits. This serves as the asmachta (supporting text) for the Rabbinic limit.
• Shulchan Aruch (Orach Chayim 404:1): The Mechaber reflects the later consensus that Tchum is primarily Rabbinic, yet the Remah insists on being stringent to account for the Rambam’s view, demonstrating the meta-halachic strategy of "stringency in doubt" regarding Biblical prohibitions.

Psak/Practice

The psak follows the Rambam’s structure:

1. Intentional violation of 12 mil incurs malkot (lashes).
2. Unintentional violation is treated with leniency regarding the four-cubit limit if the traveler becomes disoriented (the dina d'malchuta of Halacha).
3. Modern Application: In urban travel, we rely on the definition of a "city" (the eruv or continuous settlement) as a single domain. If one crosses the Tchum, one is restricted to four cubits—a severe penalty that enforces the sanctity of the Sabbath "place."

Takeaway

The Tchum limit is not just about geography; it is a legal tethering of the human soul to a defined "place" to prevent the fragmentation of the Sabbath experience. The Rambam teaches that while the Sages set the 2,000-cubit gate, the Torah sets the 12-mil fence.