Reference for Eruvin 136:5

גופא רב אמר מבטלין וחוזרין ומבטלין ושמואל אמר אין מבטלין וחוזרין ומבטלין

Is it not because a person, as soon as he renounces his right.<span class="x" onmousemove="('comment',' To his share in a courtyard.');">¹²</span> completely eliminates himself from that place and assumes the status of a tenant of a different courtyard and no renunciation is valid between two courtyards? How then<span class="x" onmousemove="('comment',' Since on adopting one ruling the adoption of the other is inevitable.');">¹³</span> could the Master<span class="x" onmousemove="('comment',' Lit., 'the Master also should not'.');">¹⁴</span>

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