Reference for Yevamot 178:11
דאמר ר' יצחק מנין שהפקר ב"ד היה הפקר שנא' (עזרא י, ח) כל אשר לא יבא לשלשת הימים בעצת השרים והזקנים יחרם כל רכושו והוא יבדל מקהל הגולה
who should here be her legal heir, and yet it is the husband who is heir in accordance with a Rabbinical ordinance!<span class="x" onmousemove="('comment',' How then could it be maintained that Beth din has no authority to abrogate Pentateuchal laws? ');"><sup>31</sup></span> — Hefker<span class="x" onmousemove="('comment',' [H], a declaration that the property of a certain person is ownerless. V. Glos. ');"><sup>32</sup></span> by <i>Beth din</i> is legal hefker.<span class="x" onmousemove="('comment',' The Rabbis have consequently full authority to transfer the property of the minor from her father's heirs to her husband, and such transfer cannot be regarded as an abrogation of the Pentateuchal law. The reading [H] 'was' for the usual [H] 'is' may be a censorial alteration. Cf. Golds. a.l. ');"><sup>33</sup></span>