Reference for Chullin 266:4

בשרא קא זבין

Then in the case of the priest we must suppose the same circumstances, that he sat by the till, why is it necessary to indicate by a sign? - Because people might say that he merely trusted him [the priest].<span class="x" onmousemove="('comment',' To guard the till, but it does not necessarily imply that the priest has a share in the business.');">³</span>

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