Reference for Bekhorot 116:22

אמר רב הונא

THEY ARE ALL EXEMPT.<span class="x" onmousemove="('comment',' For those already counted are exempt from redemption because a count properly begun redeems, since there were ten in the shed when counting commenced, and as we are in doubt which is the redeemed lamb among the flock, all are exempt.');">¹⁶</span>

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