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When a thief steals a lamb that later changes in value or quality (e.g., becomes an ayil or fat), what must he repay? The shiur analyzes Rashi (רש"י)'s principle of "klei ganav klei meshalem"—that the thief pays back in kind rather than cash. This creates a chiddush: the Torah (תורה) mandates returning animals over money, even when the victim might prefer cash, suggesting the primary obligation is restitution in kind, not monetary compensation.
This shiur on Bava Kamma 66a examines the fundamental question of what a thief (ganav) must repay when the stolen item undergoes physical or value changes between theft and adjudication. The Gemara (גמרא) presents a dispute centering on whether payment is measured kidmei kor (at the time of theft) or kadashta (at the time of payment/judgment), and whether payment must be made in kind (the actual animal) or can be made in cash. Rabbi Zweig begins by analyzing Rashi (רש"י)'s interpretation. According to Rashi, the Gemara's discussion is limited to cases where the stolen item underwent a physical change—specifically klei v'nas ayil (a lamb that became a ram) or chishuv sheminah (a thin animal that became fat). Rashi establishes the principle of "klei ganav klei meshalem"—if you stole an animal (klei), you repay with an animal. This means if you stole a lamb and it became a ram, you can discharge your obligation by returning another lamb. However, if you choose to pay in cash, you must pay the value of the ram (the ayil). Conversely, if you stole a fat animal that became thin, paying in kind means returning a fat animal, but paying cash requires only the thin animal's value.
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Bava Kamma 66a
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When an animal damages crops, the Torah prescribes a unique payment formula based on multiplying the damaged area by sixty. Does this formula redefine the actual loss, or does it merely create a payment mechanism that still acknowledges the full damage sustained? The Gemara explores whether someone who ate in doubt should pay the higher-quality amount, examining how the principle of motzi me-chaveiro alav haraya applies when payments fall within the range of actual loss.
What makes testimony valid when different witnesses testify to different parts of the same event? The Gemara debates whether the principle of "davar v'lo chatzi davar" (complete testimony, not partial) disqualifies witnesses who testify separately to theft and slaughter. Rashi's approach reveals that the issue is not merely combining elements, but whether each witness's statement is independently meaningful.
Why is a ganav who sells a stolen animal on Shabbos exempt from the fourfold/fivefold payment? The shiur analyzes whether this exemption stems from kam lei b'derabbah or from the absence of a valid mechira. The Rashba's principle that matana resembles mechira when it is "nishtarish b'chet" is explored, along with the Rambam's position on hekdesh and the distinction between giving to bedek habayis versus mizbe'ach.
When a ganav shechts a stolen animal l'avodah zarah, why isn't he patur from payment since it's already isur hana'ah? The shiur explores the fundamental machloket Rashi-Tosafot on whether the isur derives from the act of shechita or from the din shechita itself. The Gemara's application of davar garem be'mamon ke'mamon domi extends the analysis to when borrowed animals become niskal.
