Commentary for Eruvin 152:15

<big><strong>גמ׳</strong></big> אין בו ארבעה מאי אמר רב אויר שתי רשויות שולטת בו לא יזיז בו אפילו מלא נימא

<big><b>MISHNAH: </b></big>IF A WAIL BETWEEN TWO COURTYARDS WAS TEN HANDBREADTHS HIGH AND FOUR HANDBREADTHS THICK, TWO 'ERUBS MAY BE PREPARED<span class="x" onmousemove="('comment',' Separate ones for each courtyard.');">³⁵</span> BUT NOT ONE.<span class="x" onmousemove="('comment',' Sc. the two courtyards are not allowed to prepare a joint 'erub on account of the wall that intervened between then,. The prescribed thickness of four handbreadths, which has no bearing on this restriction since it applies to all walls whatever their thickness, was mentioned on account of the ruling that follows which is applicable only where the thickness of the wall was no less than four handbreadths. A lesser thickness does not constitute a separate domain.');">³⁶</span> IF THERE WAS FRUIT ON THE TOP OF IT,<span class="x" onmousemove="('comment',' The wall of the prescribed thickness (cf. prev. n.) .');">³⁷</span> THE TENANTS ON EITHER SIDE MAY CLIMB UP AND EAT THEM PROVIDED<span class="x" onmousemove="('comment',' Since it is forbidden to carry from one domain into another (cf. prev. two notes) .');">³⁸</span> THEY DO NOT CARRY THEM DOWN. IF A BREACH TO THE EXTENT OF TEN CUBITS WAS MADE IN THE WALL, THE TENANTS MAY PREPARE TWO 'ERUBS<span class="x" onmousemove="('comment',' Separate ones for each courtyard.');">³⁵</span> OR, IF THEY PREFER, ONLY ONE,<span class="x" onmousemove="('comment',' Jointly.');">³⁹</span> BECAUSE IT<span class="x" onmousemove="('comment',' A gap that is not bigger than ten cubits.');">⁴⁰</span> IS LIKE A DOORWAY. IF THE BREACH WAS BIGGER, ONLY ONE 'ERUB AND NOT TWO MAY BE PREPARED.<span class="x" onmousemove="('comment',' A gap so great converts the two courtyards into one; and the tenants, like those of the same courtyard, may not break up into two parties for 'erub. If they do they impose restrictions of movement upon each other.');">⁴¹</span> <big><b>GEMARA: </b></big>What is the ruling where it<span class="x" onmousemove="('comment',' The WALL.');">⁴²</span> was not FOUR HANDBREADTHS wide? - Rab replied: The air of two domains<span class="x" onmousemove="('comment',' That of the two courtyards between which it is situated.');">⁴³</span> prevails upon it and<span class="x" onmousemove="('comment',' Since it constitutes no independent domain and every fraction of its space is dominated (cf. prev. n.) by two domains.');">⁴⁴</span> no object on it may be moved even as far as a hair's breadth.

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