אבן העזר נ״דEven HaEzer 54

Se’if 1א׳

מִי שֶׁצִּוָּה לָתֵת לְבִתּוֹ כָּךְ וְכָךְ מָעוֹת לְפַרְנָסָתָּהּ, לִקַּח בָּהֶם קַרְקַע, בֵּין שֶׁהָיָה שְׁכִיב מְרַע בֵּין שֶׁהָיָה בָּרִיא, וּמֵת, וַהֲרֵי הַמָּעוֹת בְּיַד הַשָּׁלִישׁ, וְאָמְרָה הַבַּת: תְּנוּ אוֹתָם לְבַעֲלִי, כָּל מַה שֶּׁיִּרְצֶה יַעֲשֶׂה בָּהֶם: אִם הָיְתָה גְּדוֹלָה, וְנִשֵּׂאת, הָרְשׁוּת בְּיָדָהּ; וְאִם עֲדַיִן מְאֹרָסָה הִיא, יַעֲשֶׂה שָׁלִישׁ מַה שֶׁהֻשְׁלַשׁ בְּיָדוֹ; וְאִם עֲדַיִן קְטַנָּה הִיא, אֲפִלּוּ נִשֵּׂאת, אֵין שׁוֹמְעִין לָהּ, אֶלָּא יַעֲשֶׂה שָׁלִישׁ כְּמוֹ שֶׁצִּוָּה הָאָב. (וְיֵשׁ אוֹמְרִים דְּבָעִינָן שֶׁהֻשְׁלַשׁ מִתְּחִלָּה לְכָךְ, וְעַיֵּן בְּחשֶׁן הַמִּשְׁפָּט סִימָן רצ"ב):

One who ordered that [his executor] give his daughter some sum of money for her sustenance, to purchase land, whether he is on his death bed or he is well, and he then died, and the money is with a third party, and the daughter says, "Give the money to my husband who may then with it as he wishes." If the daughter is an adult, and she is married, she has full authority to do as she likes. If she is still betrothed, the third party should follow his instructions. If she is still a child, even if she is marries, we so not listen to her and the third party must follow the father's orders. Rem"a: Some authorities say that the third party must have been explicitly delegated for this purpose, see (Shulchan Arukh, Choshen Mishpat 292).