Pesachim 99b: The Mitzvah of Eating Matzah on Pesach Night

Full Summary

This shiur provides an in-depth analysis of Gemara (גמרא) Pesachim 99b, focusing on the mitzvah (מצוה) of achilas matzah (eating matzah) on Pesach (פסח) night. Rabbi Zweig begins by examining Tosafot's position on the timing of when matzah can be eaten, particularly addressing the question of whether one can fulfill the mitzvah during tosefet yom tov (the early acceptance of the holiday). He presents several complex questions (kashas) on Tosafot's approach, including why we don't apply the same gezeirah (rabbinic decree) to matzah that we apply to other mitzvot like kriyat shema, which must be completed before chatzot (midnight). The shiur explores a fundamental distinction between Chag HaPesach (the holiday of Pesach on the 14th of Nissan) and Chag HaMatzot (the Festival of Matzot beginning the night of the 15th). Rabbi Zweig suggests that these are two separate holidays that overlap on the night of the 15th of Nissan, with different halachic implications. He analyzes how this distinction affects the nature of the mitzva to eat matzah, citing various sources including the Mechilta and Rambam (רמב"ם). The discussion delves into the Rambam's unique position that distinguishes between the chiyuv (obligation) to eat a kezayit of matzah and the kiyum hamitzvah (fulfillment of the mitzvah) for additional eating throughout the night. Rabbi Zweig addresses why women would be obligated in Hallel al hanes (Hallel for the miracle) according to Tosafot's understanding, and explores the relationship between the Korban Pesach and the mitzvah of eating matzah. The shiur concludes by explaining how this framework resolves various difficulties in understanding the nature and scope of the matzah obligation on Pesach night.