Mishneh Torah, Rest on a Holiday 7

Sugya Map: The Ontology of Chol HaMo’ed

• The Issue: Is the prohibition of labor on Chol HaMo’ed de’oraita (Scriptural) or derabanan (Rabbinic)?
• Nafka Mina: In cases of doubt (safek), a de’oraita requires stringency, while a derabanan permits leniency.
• Primary Sources: Leviticus 23:37, Moed Katan 11a, Mishneh Torah, Rest on a Holiday 7:1.

Text Snapshot

Rambam states: "A person who performs forbidden labor on these days is given stripes for rebelliousness, for the prohibition is Rabbinic in origin" (Mishneh Torah, Rest on a Holiday 7:1).

• Leshon Nuance: The term makat mardut (stripes for rebelliousness) explicitly brackets the prohibition as Rabbinic. Rambam rejects the asmachta (allusion) model for Scriptural status, viewing the verses as post-facto support for a Rabbinic decree.

Readings: The Debate

• Rambam (Hilchot Yom Tov 7:1): Maintains it is purely Rabbinic. He harmonizes the Talmudic verses by treating them as asmachtot.
• Ramban/Rashba (ad loc.): Argue the prohibition is de’oraita. They posit that the Torah empowered the Sages to define the parameters, but the core prohibition remains rooted in the sanctity of the Mo'ed as a "holy convocation."

Friction

Kushya: If it is purely Rabbinic, why does the Talmud in Temurah 4b suggest that a verse is required to permit sacrifices on Chol HaMo'ed? If no prohibition existed from the Torah, there would be nothing to "permit." Terutz: As noted in the Nachal Eitan, the Torah’s explicit permission for sacrifices serves as a boundary marker: it prevents the Sages from using their power to forbid what the Torah explicitly allowed. It is a "constitutional" safeguard, not evidence that the baseline activity was forbidden by the Torah.

Psak/Practice

In practice, the Shulchan Aruch (Orach Chayim 530) follows the Rambam’s view that the core is Rabbinic, yet adopts the stringent view of the Rishonim regarding safek (doubts). We treat the prohibition with the gravity of a de’oraita in application, despite the theoretical Rabbinic classification—a classic "stringency of the Sages" applied to the Mo'ed.

Takeaway

Chol HaMo'ed is "sanctified" not by the 39 labors of Shabbat, but by the "festive mood." If you are unsure if a task is permitted, remember the heuristic: if it is davar ha-aved (preventing loss), it is permitted; if it is for convenience, it remains forbidden.