Reference for Eruvin 177:2

וכי לא עירבו מאי טעמא לא אמר רב אשי גזירה דילמא אתי לאפוקי ממאני דבתים להתם:

in utensils from their houses to the trough.<span class="x" onmousemove="('comment',' Lit., 'there'. An act which in the absence of a joint 'erub is forbidden.');">⁴</span> <big><b>MISHNAH: </b></big>ALL THE ROOFS OF A TOWN<span class="x" onmousemove="('comment',' Though the houses beneath are occupied by different tenants and constitute different domains.');">⁵</span> CONSTITUTE<span class="x" onmousemove="('comment',' Since they are only infrequently used.');">⁶</span>

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