Mishneh Torah, Leavened and Unleavened Bread 2-4

Sugya Map

• Primary Issue: The nature and timing of the mitzvah to destroy chametz (tashbitu).
• The Core Conflict: Does tashbitu function as a preparatory act for the prohibition of bal yera'eh (appearing/being found), or is it an independent imperative triggered by the 14th of Nisan?
• Nafka Mina(s):
  • Does one fulfill the mitzvah if they destroy chametz before the 14th?
  • Are women obligated in tashbitu? (If it is a mitzvah she-hazman gerama vs. a universal duty).
  • The role of bittul (nullification) vs. bi'ur (burning/physical destruction).
• Primary Sources: Exodus 12:15 ("ba-yom ha-rishon tashbitu"), Exodus 34:25 ("lo tishchat al chametz dam zivchi"), Pesachim 4a–10b.

Text Snapshot

• Mishneh Torah, Hilchot Chametz U'Matzah 2:1: "It is a positive commandment from the Torah to destroy chametz before the time it becomes forbidden to be eaten... On the basis of the oral tradition, it is derived that 'the first day' refers to the day of the fourteenth."
• Leshon Nuance: Rambam uses the term “mitzvah asseh min ha-Torah” regarding tashbitu. Note the juxtaposition of the peshat (the 14th) and the re'ayah (the Paschal sacrifice restriction). Rambam’s choice to define "destruction" (bi'ur) as bittul (mental nullification) in 2:2 suggests a radical internalizing of the commandment—the "dust of the earth" concept.

Readings

1. The Chiddush of Seder Mishnah

The Seder Mishnah engages in a sophisticated defense of Rambam against the Kessef Mishneh. He addresses the perceived redundancy in Rambam’s citation of both the "oral tradition" regarding the 14th and the Paschal prohibition. His central chiddush is that tashbitu is not merely a technical prerequisite for the prohibition of bal yera'eh; rather, the 14th is a yom ha-meyuchad (a day uniquely sanctified) for this mitzvah. He argues that even if one destroys chametz during the early hours of the 14th (when it is still permissible to eat), one has already fulfilled the positive commandment of tashbitu. This contradicts the Ra'avad and Rosh, who view the mitzvah as inherently tethered to the onset of the prohibition of bal yera'eh. By decoupling tashbitu from the issur, Rambam elevates the act of removal to a standalone service of God, rather than a mere precaution against transgression.

2. The Perspective of Sefer HaMenucha

The Sefer HaMenucha focuses on the mechanism of bittul as the ikkar (essence) of the mitzvah. He notes that because bittul is a purely mental act (bilvo), no berachah is recited upon it. He highlights a crucial halachic distinction: while bittul is effective for chametz that is inaccessible (e.g., collapsed buildings), it is insufficient for chametz one can reach. This creates a two-tiered obligation: bittul for the unknown/inaccessible, and bi'ur (physical removal) for the known. His chiddush lies in his insistence that the Rabbinic requirement to recite the bittul formula (Kol Chamira) is merely an externalization of the mental resolve. Without the haskamat ha-lev (agreement of the heart), the oral declaration is a nullity. This reinforces a theme in Rambam: the Torah law is satisfied by the "heart," while the Sages demand the "hand" (search) and the "tongue" (declaration) to ensure the heart truly follows.

Friction

The Kushya: The "Redundancy" Problem

The Kessef Mishneh famously attacks Rambam: if bi-yom ha-rishon is already known to be the 14th via masorah, why cite the Paschal sacrifice verse (lo tishchat)? Furthermore, that verse itself seems to serve a separate purpose—the prohibition of slaughtering the lamb while chametz exists—making its use as a proof-text for the timing of tashbitu appear logically disjointed.

The Terutz: The Functional Timing

The Seder Mishnah offers a brilliant, albeit dense, resolution. He posits that the masorah provides the day (the 14th), but not the hour. Without the Paschal verse, one might assume the mitzvah of tashbitu only applies when the issur (prohibition) begins (the 6th hour). By invoking the Paschal sacrifice—which is slaughtered at the start of the 7th hour—the Torah signals that the mitzvah of removal must precede the prohibited time, effectively creating a "buffer" zone. Thus, the proof-text is not redundant; it is the halachic clock that calibrates the mitzvah.

A secondary resolution (based on Shorshei HaYam) suggests that the Paschal verse functions as an asmachta (support) rather than a strict derashah. Rambam, in his Sefer HaMitzvot, views the entire suqya of Pesachim as a series of indicators. The masorah is the source, and the Paschal verse is the gilyon ha-milta (revelation of the matter)—the Torah showing us why that specific day was chosen: to ensure the holiness of the sacrifice is not compromised by the presence of leaven.

Intertext

• Tanakh Parallel: Exodus 12:15 ("ba-yom ha-rishon tashbitu") vs. Exodus 13:7 ("lo yeira'eh lecha chametz"). The interplay between the positive command (tashbitu) and the negative prohibitions (bal yera'eh/bal yimatzei) mirrors the structure of Hilchot Chametz U'Matzah.
• SA/Responsa: Shulchan Aruch, Orach Chayim 431. The development from Rambam’s "mental nullification" to the modern standardized bittul formula illustrates the transition from an internal spiritual discipline to a communal, liturgical requirement. The Nodah BiYhudah (OC 20) further grapples with the Rambam’s stance on when the issur begins, highlighting the tension between the 14th and the 15th that defines all Pesach halacha.

Psak/Practice

In contemporary practice, the Rambam’s focus on the "mental resolve" remains the meta-psak heuristic for bittul. Even as we perform the search (bedikah) with candle and feather (the "hand"), the bittul (the "heart") is what renders the chametz legally non-existent. The takeaway for the observant is that the halacha does not treat the search as a scavenger hunt, but as a ritualized acknowledgment of ownership. We search to find, but we nullify to relinquish—a profound psychological preparation for the Seder.

Takeaway

• Tashbitu is an active, positive engagement with our domain, not a passive avoidance of leaven.
• The "destruction" of chametz is as much about the sovereignty of the heart as it is about the fire in the backyard.