Reference for Gittin 141:14

אי באשתו ה"נ הכא במאי עסקינן ביבמתו

— R. Abbahu said: It refers to the inheritance of his eldest son.<span class="x" onmousemove="('comment',' I.e., his signifying that his eldest son should not have a double portion (Rashi), or that one of his sons was the eldest (Tosaf). ');">¹³</span>

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