Halakhah for Ketubot 6:6
יְתוֹמָה שֶׁהִשִּׂיאַתָּה אִמָּהּ אוֹ אַחֶיהָ מִדַּעְתָּהּ, וְכָתְבוּ לָהּ בְּמֵאָה אוֹ בַחֲמִשִּׁים זוּז, יְכוֹלָה הִיא מִשֶּׁתַּגְדִּיל לְהוֹצִיא מִיָּדָן מַה שֶּׁרָאוּי לְהִנָּתֵן לָהּ. רַבִּי יְהוּדָה אוֹמֵר, אִם הִשִּׂיא אֶת הַבַּת הָרִאשׁוֹנָה, יִנָּתֵן לַשְּׁנִיָּה כְדֶרֶךְ שֶׁנָּתַן לָרִאשׁוֹנָה. וַחֲכָמִים אוֹמְרִים, פְּעָמִים שֶׁאָדָם עָנִי וְהֶעֱשִׁיר אוֹ עָשִׁיר וְהֶעֱנִי, אֶלָּא שָׁמִין אֶת הַנְּכָסִים וְנוֹתְנִין לָהּ:
If an orphan were married off by her mother or her brothers by her consent, and they wrote to her (a dowry of) a hundred or fifty zuz, she can, when she comes of age, take from them what was rightfully hers [a tenth of the inheritance]. R. Yehudah says: If he [the father] married off the first daughter [in his lifetime], the second is given what was given to the first [whether less or more than a tenth. The halachah is in accordance with R. Yehudah, that we follow the father's judgment. And if we cannot ascertain what that judgment was, she is given a tenth of the property extant at the time of her marriage — from land, but not from chattel. (There are those who hold that today she is given a tenth of chattel, too.) And if at the time of her marriage she did not claim it from the heirs, she may claim it after her marriage, and we do not say that she waives it to them. And this applies only when she is fed from her father's property; but if the heirs ceased feeding her, (it is assumed that) she waived it, unless she indicated otherwise. And if she were a bogereth, who is not fed by them, and she got married without claiming what was due her as dowry from her father's property, (it is assumed that) she waived it to the heirs, and she can no longer claim it, even if she were fed from their property.] The sages say: Sometimes a poor man grows wealthy and a wealthy man grows poor. Rather, the property is assessed, and (her share) is given her.