Reference for Eruvin 152:8

תרגומא אחצירות והא אחד לי קתני תרגומא אד' על ד'

Raba raised an objection against R'Nahman: A window, irrespective of whether<span class="x" onmousemove="('comment',' Lit., 'one to me'.');">¹⁹</span> it was between two courtyards, between two houses, between two upper rooms, between two roofs,<span class="x" onmousemove="('comment',' According to the Rabbis who ruled that as the residents are divided in their domains below so are they divided on their roofs above and, consequently, no movement of objects from one person's roof to that of another is permitted unless a proper 'erub is prepared.');">²⁰</span> or between two rooms, must be of the size of<span class="x" onmousemove="('comment',' Lit., 'all of them'.');">²¹</span>

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