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What does the Rambam (רמב"ם) mean when defining mefareik as "hu shetzorech ledam" - that one needs the blood? The shiur analyzes seeming contradictions where the Rambam rules one is liable for mefareik even without wanting the blood, like striking someone in anger for nachas ruach.
This advanced shiur provides a detailed analysis of the Talmudic tractate Kesubos focusing on the melacha (prohibited Sabbath labor) of mefareik (extracting/separating). The primary discussion centers on understanding the Rambam (רמב"ם)'s definition and application of this melacha, particularly his formulation "hu shetzorech ledam" (one who needs the blood). The shiur begins by examining the fundamental dispute between Rabbi Yehuda and the Chachamim regarding whether the prohibition of dosh (threshing) applies to "ein dosh ela bgedulei karka" (only things that grow from the ground). This extends to the question of whether mefareik applies to fish, animals, and humans, with the conclusion that all are considered gedulei karka for this purpose.
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Why does halacha forbid entering dangerous places if everything happens by Divine decree? The shiur examines the debate between Rashi and Tosfos on traveling at night, developing a fundamental distinction: Rashi holds one must avoid even deserved punishments that Hashem delays through mercy, while Tosfos holds the prohibition addresses self-inflicted harm through free will. This framework reveals how people rationalize self-destructive behavior as "hashgacha."
Why does the Gemara praise hospitality to scholars as a unique mitzvah rather than ordinary hachnasas orchim? The shiur distinguishes two mitzvahs: hachnasas orchim (providing for those in need) and connecting to talmidei chachamim (cleaving to God through scholars). Yisro's meal for the Jewish leaders wasn't charity—it was his way of bonding with those transformed by Torah, teaching that learning must fundamentally change who we are.
Kesubos 5b
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