Reference for Bava Kamma 143:5

דאי ישנה לשחיטה מתחילה ועד סוף כיון דשחט בה פורתא אסרה אידך לא דמריה קא טבח

— R. Huna, the son of Raba,<span class="x" onmousemove="('comment',' [Read with MS.M., 'R. Aba b. Raba' as on p. 414, v. D.S. a.l.] ');">⁸</span> said to him: The liability might have been just for that commencement in the slightest degree.<span class="x" onmousemove="('comment',' Before the animal became forbidden for any use. ');">⁹</span>

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