Reference for Eruvin 131:5

דאמר שמואל כל מקום שאוסרין ומערבין מבטלין מערבין ואין אוסרין אוסרין ואין מערבין אין מבטלין

lived in one courtyard,<span class="x" onmousemove="('comment',' Where a heathen tenant also lived.');">¹¹</span> one of them may rent the heathen's share on behalf of all of them. R'Eleazar was astonished at it.<span class="x" onmousemove="('comment',' At the decision supra to rent the heathen's share on the Sabbath and to renounce the individual Israelites' rights in favour of one of them.');">¹²</span>

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