יא מתיב רב כהנא וכולן אם מתו או מיאנו או נתגרשו או שנמצאו איילונית צרותיהן מותרות
11 while she needs mi'un, in case her father did not consent to the kiddushin, and it is said that the kiddushin with her sister [by the same man] is invalid.<span class="x" onmousemove="('comment',' If she is given a divorce, it will be assumed that her father consented to the betrothal, which had Biblical force. Consequently, should the same man then betroth her sister, it is quite invalid, since she is his divorced wife's sister (v. Lev. XVIII, 18, which is interpreted as applying to such a case) . But her father may not have consented, and so neither the betrothal nor the divorce are Biblical, wherefore her sister's betrothal is valid and requires a divorce for its dissolution. (He could not keep the sister, for fear that the first marriage was legal.) Hence she needs mi'un, to draw attention to this possibility.');"><sup>20</sup></span> R'Nahman said: Providing that they negotiated [with the father].<span class="x" onmousemove="('comment',' And he consented (Tosaf. of Ri the Elder) . Hence, when he subsequently betroths her without her father's knowledge, her father may thereafter consent, whereby the kiddushin becomes retrospectively valid, and so she needs a divorce. But otherwise she needs no divorce.');"><sup>21</sup></span> 'Ulla said: She does not even require mi'un.<span class="x" onmousemove="('comment',' Because a minor's action in her father's lifetime has not even Biblical force.');"><sup>22</sup></span>