Reference for Eruvin 85:1

להבריח מים עשויות

are made only to keep the water out.<span class="x" onmousemove="('comment',' Lit., 'to cause to flee'; hence they cannot be regarded as proper walls.');">¹</span> Then why does not Rabbah give the same reason as R'Zera? - He can answer you:<span class="x" onmousemove="('comment',' So MS.M. wanting in cur. edd.');">²</span>

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