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Why is a dried lulav (yoveish) disqualified all seven days when hidur mitzvah (מצוה) ordinarily isn't me'akev? The shiur analyzes three approaches: Rashi (רש"י) holds the seven-day requirement flows from zecher l'mikdash where hidur mitzvah is me'akev because of kavod Shem Shamayim. Tosafot distinguishes ikar lekicha from hidur mitzvah. The Ramban (רמב"ן) learns the Gemara (גמרא) refers to the Torah (תורה)-level mikdash obligation, creating a chakira between the gevulin mitzvah (lekachtem) and the mikdash mitzvah (u'smachtem).
The shiur presents an intricate analysis of Sukkah 29b, examining why a dried lulav (yoveish) is disqualified all seven days of Sukkos (סוכות) when the general principle is that hidur mitzvah (מצוה) does not invalidate a mitzvah object. The discussion revolves around three major approaches: Rashi (רש"י), Tosafot, and Ramban (רמב"ן), each offering fundamentally different understandings of the Gemara (גמרא)'s structure. According to Rashi and Tosafot, the Gemara is addressing a rabbinic decree (din derabanan) that extends the requirement of hadar to all seven days as a commemoration of the mikdash (zecher l'mikdash). Rashi explains that the requirement flows from the concept that zecher l'mikdash creates a framework where hidur mitzvah becomes me'akev (invalidating). The shiur develops that Rashi distinguishes between two types of mitzvos: the gevulin obligation (taking the lulav outside the mikdash) and the mikdash obligation (taking it in the Temple). In the mikdash context, where one is being makir Shem Shamayim (acknowledging God's Name), hidur mitzvah is me'akev even though it normally would not be. Since our seven-day rabbinic observance is zecher l'mikdash, it inherits this stringency.
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Sukkah 29b
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