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The Gemara (גמרא) asks: from where do we know that juxtaposed verses (semuchim) teach a halachic relationship? The shiur examines multiple approaches in the Rishonim—Rashi (רש"י), Rambam (רמב"ם), Tosafot, and Rashba—to how semuchim work in the case of Yevamos 4a, where lo sachsom shor ("do not muzzle an ox") is adjacent to the laws of yibum. Does juxtaposition mean reconciling conflicting laws, or does it mean absorbing one law into the other?
This shiur analyzes the Gemara (גמרא) in Yevamos 4a, which addresses a fundamental question: from where in the Torah (תורה) do we derive that juxtaposed verses (semuchim) teach us substantive halachic relationships? The Gemara brings two examples: the juxtaposition of shaatnez (the prohibition of wearing wool and linen) with tzitzis, and the juxtaposition of lo sachsom shor b'disho (the prohibition of muzzling an ox while it threshes) with the laws of yibum (levirate marriage). Rabbi Zweig opens by questioning why the Gemara needs a special limud (derivation) for semuchim at all. If the principle of ein mukdam u'meuchar baTorah—that the Torah is not written in chronological order—is already established, then the very fact that two parshiyos are written next to each other should automatically signal a relationship. The answer suggested is that semuchim must be a subdivision of gezeirah shavah, a method of comparison that requires its own independent source. While gezeirah shavah compares similar words across different contexts, semuchim compares adjacent passages and requires us to read them in conjunction.
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Yevamos 4a
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Why does the Gemara present a kal v'chomer for chuppah making kiddushin based on kesef not being maichel b'terumah, only to reject it? The shiur reveals that even the rejected kal v'chomer establishes a fundamental yesod: kiddushin is a kinyan for ishus (marital relationship), not merely a kinyan in hilchos kinyanim. The second kal v'chomer—from chuppah being gomeres—raises Tosafos's famous question.
Is the kesef used in kiddushin a true kinyan (acquisition), or merely a symbolic means of establishing marriage? The shiur analyzes multiple interpretations of the Gemara's derivation from ki yikach ki'ach mi'Sayeffron, exploring whether marriage constitutes ownership, and develops three fundamental approaches: (1) The Gemara proves ishus is a kinyan, (2) ishus is not a kinyan but uses kinyan-like means, or (3) ishus is a kinyan but the kesef may not be a ma'aseh kinyan. The Rambam's position—calling kesef "midivrei sofrim"—is explained as distinguishing between cross-referencing concepts versus borrowing terminology.
Why does the Mishna alternate between the language of "kinyan" (acquisition) and "kiddushin" (sanctification) when describing marriage? The shiur develops a fundamental distinction: marriage has two separate aspects—a kinyan dimension (ownership) and a kedusha dimension (sanctified relationship). Either aspect can initiate the bond, and understanding this dual nature resolves multiple textual and halachic questions throughout the sugya.
Does kiddushei shetar require a shevah pruta? The Ran presents two approaches to the Rif's position. The shiur develops the Ran's second pshat that shetar kiddushin functions as a hachnah (exchange) rather than a mere kinyan nesina. This reading has profound implications for isuri hana'ah, mechubar, and the relationship between kesef and shetar.
