R. Uzziel on Mitzvot Abetted by Sins (10 Kislev)

שו"ת משפטי עוזיאל ד:עניינים כלליים ו 10 Kislev 5700 (1939)

R. Uzziel takes up the concept of mitzvah haba'ah be-averah, mitzvot whose performance is fostered by sin. Does it apply to Rabbinic obligations? Or if the sin transgressed was a Rabbinic one? His prime example is lulav after the first day of Sukkot, which may have special laws of its own...

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