Menachot 66

Sugya Map

• Primary Issue: Determining the precise commencement date for the Sefirat HaOmer. Specifically, refuting the Boethusian (Sadducee) interpretation of "mimacharat hashabbat" (Lev. 23:15) as the Sunday following the first day of Passover.
• Nafka Mina: Whether the counting is a fixed date tethered to the festival (16th of Nisan) or a floating date tethered to the weekly cycle (Sunday).
• Primary Sources:
  • Deuteronomy 16:9 ("Seven weeks shall you count... from the time the sickle is first put to the standing grain").
  • Leviticus 23:15–16 ("From the morrow after the day of rest... you shall count fifty days").
  • Menachot 66a (The Ten Proofs against the Boethusians).

Text Snapshot

"ושבע שבתות תמימות תהיינה" (ויקרא כג:טו) – אימתי אתה מוצא שבע שבתות תמימות? בזמן שאתה מתחיל מן הערב. (מנחות סו ע"א)

• Nuance: The Gemara interprets "temimot" (complete) not merely as a mathematical qualifier, but as a temporal requirement. The dikduk of "temimot" necessitates that the count begins at night to ensure the first day is fully included. If one waits until the morning, the first "day" is truncated, rendering the week incomplete.

Readings

1. Rashi (ad loc., s.v. im mid’Rabban Yochanan)

Rashi explains that the kushya against Rabban Yochanan ben Zakkai—who uses the apparent contradiction between "fifty days" and "seven weeks" to prove the omer is fixed—is that his proof is technically redundant. Abaye’s principle (that one must count both days and weeks) resolves the contradiction without needing to force the definition of "Shabbat." Rashi’s chiddush is that logical reconciliation (the terutz of Abaye) functions as a legal refutation of the proof’s necessity; if the verses can be reconciled via a halachic mechanism (counting days and weeks), the Boethusian polemic loses its foundational tension.

2. The Steinsaltz Analysis (on Rava’s criteria)

Steinsaltz highlights that Rava’s "filtering" of the ten proofs is a masterclass in lomdus. Rava accepts only those proofs that possess "no refutation." The chiddush here is the distinction between "persuasive" proofs and "irrefutable" proofs. Rabbi Eliezer’s proof—that the omer depends on the Beit Din because Shabbat is fixed by nature—is strong but technically refutable: it doesn’t explicitly prove it must be the 16th of Nisan; it could theoretically be the 21st (the last day of the festival). Only those proofs that rely on internal textual indicators—the equivalence of "Shabbat" in the context of Shavuot or the kashrut of the "sickle" verse—survive Rava’s rigorous scrutiny.

Friction

The Kushya: The "Floating" Proof

The strongest kushya against the Rabbis is the semantic ambiguity of Shabbat. If the Torah wanted to specify the 16th of Nisan, it could have said "the day after the first day of the festival." By using the term Shabbat, the Boethusians claim an inherent link to the weekly cycle.

The Terutz: The "Court" Dependency

The terutz rests on the gezera shava and the structural necessity of the Beit Din. As the Gemara notes, the counting is "for you" (lach), implying a count mandated by the Sanhedrin. If the count were tied to the weekly Shabbat, it would be an automatic, cosmic clock accessible to everyone. By defining the start date as a function of the Beit Din’s sanctification of the new moon, the counting becomes an act of national-institutional time-keeping. The "Shabbat" mentioned is not the Shabbat Bereshit, but the Shabbat of the festival—the cessation of regular labor defined by the Yom Tov itself.

Intertext

• Chagigah 18a: Parallels the discussion of the "harvest" and the role of the Beit Din in determining festival time. The interplay between the Beit Din’s authority to fix the calendar and the resulting obligation for the individual to count is a recurring theme in the Seder Moed.
• Shulchan Aruch, Orach Chayyim 489: The SA codifies the counting as a mitzvah for "each person" (post-Temple), yet maintains the structure established in Menachot. The Be’ur Halacha notes the tension between the requirement to count days and weeks (Abaye’s ruling) and the current practice, reflecting the "commemoration of the Temple" (zecher l’Mikdash) status.

Psak/Practice

The psak follows the Sages: the omer count begins on the second night of Passover, regardless of the day of the week.

• Meta-psak Heuristic: When interpreting "vague" scriptural temporal markers, we prioritize the legislative role of the Beit Din over "natural" or "astronomical" markers. The Halacha is not merely a record of astronomical time, but a political-religious construction of time. Ameimar’s practice of not counting weeks (because we lack the omer) serves as a reminder that without the Temple, our count is an echo of the original legislative act, not the act itself.

Takeaway

The Sefirat HaOmer is not a passive observation of the calendar, but a deliberate, court-mandated sanctification of time that transforms nature (the grain harvest) into history (the bridge between Passover and Shavuot). We do not count because time passes; we count to create the time necessary to receive the Torah.