Reference for Bekhorot 89:6

השולט בשתי ידיו רבי פוסל וחכמים מכשירין:

OR IF HIS FINGERS LIE ONE ABOVE THE OTHER OR IF THEY ARE GROWN TOGETHER UP TO THE ROOT [THE MIDDLE JOINT], HE IS FIT [FOR THE PRIESTHOOD]; IF BELOW THE ROOT,<span class="x" onmousemove="('comment',' Viz., towards the nail, the fingers being all attached to each other.');">³</span>

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