Responsa for Eruvin 176:23

אלא אי איתמר הכי איתמר אמר רבא

Hence,<span class="x" onmousemove="('comment',' Cf. Supra p. 617, n. 11.');">⁵⁵</span> said Abaye, even a kor,<span class="x" onmousemove="('comment',' Of water.');">⁵⁶</span> even two kor are permitted.<span class="x" onmousemove="('comment',' 'To him' appears in cur. edd. in parenthesis and is deleted by Rashal.');">⁵⁷</span> SO ALSO IN THE CASE OF TWO UPPER STOREYS OPPOSITE EACH OTHER'Raba ruled: Even though they prepared a joint 'erub. What, asked Abaye,<span class="x" onmousemove="('comment',' 'To him' appears in cur. edd. in parenthesis and is deleted by Rashal.');">⁵⁷</span> is the reason? If it be suggested: On account of the large quantity of the water,<span class="x" onmousemove="('comment',' Four Se'ah instead of the usual two.');">⁵⁸</span> was it not taught, [it may be objected,] 'The same law applies to a trough,<span class="x" onmousemove="('comment',' Cf. Supra p. 617, n. 11.');">⁵⁵</span> a damaged vessel,<span class="x" onmousemove="('comment',' Gistera, a defective, mutilated, cracked or damaged object.');">⁵⁹</span> a pond or a tub, viz. that, though they were filled with water on the Sabbath eve, waste water may be poured into them on the Sabbath?<span class="x" onmousemove="('comment',' Though it overflows into the public domain. Why then should the increased volume of water be a bar to the use of the trough by the tenants of both upper storeys?');">⁶⁰</span> Rather, if the statement was at all made it must have been made in the following terms:<span class="x" onmousemove="('comment',' Lit., 'thus it was said'.');">⁶¹</span> Raba ruled:

Teshuvot Maharam