Reference for Eruvin 50:4

א"ל אביי כמאן כרבי שמעון לרבי שמעון נמי הא איכא אויר מקום מחיצות

R'Joseph demurred: Does a space<span class="x" onmousemove="('comment',' Sc. the courtyard.');">⁸</span> [from] which<span class="x" onmousemove="('comment',' According to R. Simeon.');">⁹</span> it is permitted [to move objects] into it cause its prohibition? - Said Abaye to him: In accordance with whose view [do you demur]?

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