Reference for Bava Kamma 157:4

ואשמעינן סיפא גנב והקדיש מה לי מכרו להדיוט מה לי מכרו לשמים:

sin this case an agent entrusted with a matter involving transgression would render his principal liable, the reason being [that Scripture says]: <i>'And he slaughter it or sell it'</i>, implying that just as a sale cannot be effected without the intervention of some other person,<span class="x" onmousemove="('comment',' I.e. the purchaser. ');">⁴</span>

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