Reference for Yoma 112:4

אלא אם בא חכם למזרח עירובו למזרח למערב עירובו למערב אבל לכאן ולכאן לא

He said to them: If it bursts.<span class="x" onmousemove="('comment',' This is a contingency that need not be reckoned with, since a guard may be appointed to watch out for such theoretical situations.');">¹</span>

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