Reference for Bava Batra 229:6

לעולם דריש מטות ושאני הכא דאמר קרא (במדבר לו, ח) וכל בת יורשת נחלה יורשת ואינה מורשת:

but not transmit<span class="x" onmousemove="('comment',' [H] Moresheth. ');">¹⁹</span> to [her mother].<span class="x" onmousemove="('comment',' And as a daughter does not transmit her estate to her mother, so also a son; hence the law in our Mishnah that a mother is not heir to her son. ');">²⁰</span> <b><i>MISHNAH</i></b>. THE ORDER OF SUCCESSION<span class="x" onmousemove="('comment',' Lit., 'inheritances'. ');">²¹</span> IS AS FOLLOWS: IF A MAN DIE, AND HAVE NO SON, THEN YE SHALL CAUSE HIS INHERITANCE TO PASS UNTO HIS DAUGHTER.<span class="x" onmousemove="('comment',' Num. XXVII, 8. ');">²²</span>

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