Jerusalem Talmud Nedarim 11.8

משנה: הַמּוּדָּר הֲנָיָיה מֵחַתְנוֹ וְהוּא רוֹצֶה לָתֵת לְבִתּוֹ מָעוֹת אוֹמֵר לָהּ הֲרֵי הַמָּעוֹת הָאֵילּוּ נְתוּנִים לָךְ בְּמַתָּנָה וּבִלְבַד שֶׁלֹּא יְהֵא לְבַעֲלֵיךְ רְשׁוּת בָּהֶן. אֶלָּא מַה שֶׁאַתְּ נוֹשָׂא וְנוֹתֶנֶת בְּפִיךְ.

MISHNAH: If a person is by a vow prevented to benefit his son-in-law but wants to give money to his daughter, he says to her: These coins are given to you as a gift on condition that your husband shall have no claim to them, except what you trade for your needs.

הלכה: הַמּוּדָּר הֲנָיָיה מֵחַתְנוֹ כול׳. תַּנֵּי. וְלֹא לֵיךְ. אָמַר רִבִּי. מָאן תַּנָּא. וְלֹא לֵיךְ. רִבִּי מֵאִיר. דְּרִבִּי מֵאִיר עֲבַד יַד הָעֶבֶד כְּיַד רַבּוֹ. מִפְּנֵי שֶׁאָמַר. וְלֹא לֵיךְ. הָא אִם לֹא אָמַר. וְלֹא לֵיךְ. זָכָת הָאִשָּׁה זָכָה בַעֲלָהּ.

HALAKHAH: “If a person is by a vow prevented to benefit his son-in-law,” etc. It was stated: “Neither do you”. Rebbi said, who stated “neither do you”? Rebbi Meĩr, for Rebbi Meïr makes the hand of the slave the hand of his master. Because he said “neither do you.” If he had not said “neither do you”, if the wife acquired, the husband would have acquired.