Mishnayos Yevamos Perek 4 Mishnah 3

With regard to a widow waiting for her yavam to either consummate a levirate marriage or perform ḥalitza with her, i.e., a yevama, to whom property was bequeathed: Beit Shammai and Beit Hillel both agree that she may sell or give away that property ab initio, and that if she did, the transfer is valid. Since she has only a levirate bond with the yavam, she retains total control of the property. This is in contrast to a betrothed woman, concerning whom Beit Hillel rule that she may not sell such property because her betrothed also has rights to it (Ketubot 78a). If she died, what should be done with the money assured to her in her marriage contract by her deceased husband and with her property that enters and leaves the marriage with her, in which a husband only ever has a usufructuary interest? Beit Shammai say: The husband’s heirs, i.e., the yavam, who stands to inherit from the husband when he consummates the levirate marriage, should divide up the property together with her father’s heirs, i.e., the woman’s family. And Beit Hillel say: The property retains its previous ownership status. Therefore, money assured to her in her marriage contract remains in the possession of the husband’s heirs. Since it was to be paid from the husband’s own property, the money is retained by his estate and passes to his heirs. And her property that enters and leaves the marriage with her remains in the possession of the father’s heirs. Since those properties belonged to her, upon her death they are inherited by her father or his heirs.

שׁוֹמֶרֶת יָבָם שֶׁנָּפְלוּ לָהּ נְכָסִים, מוֹדִים בֵּית שַׁמַּאי וּבֵית הִלֵּל שֶׁמּוֹכֶרֶת, וְנוֹתֶנֶת, וְקַיָּם. מֵתָה, מַה יַּעֲשׂוּ בִכְתֻבָּתָהּ וּבַנְּכָסִים הַנִּכְנָסִים וְיוֹצְאִין עִמָּהּ, בֵּית שַׁמַּאי אוֹמְרִים, יַחֲלֹקוּ יוֹרְשֵׁי הַבַּעַל עִם יוֹרְשֵׁי הָאָב. וּבֵית הִלֵּל אוֹמְרִים, נְכָסִים בְּחֶזְקָתָן, כְּתֻבָּה בְּחֶזְקַת יוֹרְשֵׁי הַבַּעַל, נְכָסִים הַנִּכְנָסִים וְיוֹצְאִים עִמָּהּ בְּחֶזְקַת יוֹרְשֵׁי הָאָב: