Reference for Shabbat 250:6

במאי קמיפלגי מר סבר בעינן מעשה ומר סבר לא בעינן מעשה

Rabbah said: An objection is raised against my teaching: IF A STONE [IS PLACED] IN A PUMPKIN SHELL, AND ONE CAN DRAW WATER IN IT AND IT DOES NOT FAIL OUT, ONE MAY DRAW WATER IN IT?<span class="x" onmousemove="('comment',' Which shows that the stone is now part of the vessel. ');">¹⁰</span> But it is not [analogous]: there, since it is firmly fastened, it is made as a wall [of the vessel]. R. Joseph said: An objection is also raised against my teaching: IF NOT, ONE MAY NOT DRAW WATER IN IT?<span class="x" onmousemove="('comment',' Which shows that it is not part of the vessel. ');">¹¹</span>

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