Reference for Bekhorot 114:13

ומי שדיא ליה

is it not written: The wing of the ostrich beateth joyously?<span class="x" onmousemove="('comment',' Job. XXXIX, 13.The word (beateth etc.) is explained acrostically (Men. 66b) : (it carries) (it goes up) (above) tyj,b');">¹¹</span>

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