משנה: בְּאֵי זֶה צַד אִם מֵתוּ הֵן צְרוֹתֵיהֶן מוּתָּרוֹת. הָֽיְתָה בִתּוֹ אוֹ אַחַת מִכָּל־הָעֲרָיוֹת הָאֵילּוּ נְשׂוּאָה לְאָחִיו וְלוֹ אִשָּׁה אֲחֶרֶת מֵתָה בִתּוֹ אוֹ נִתְגָּֽרְשָׁה וְאַחַר כָּךְ מֵת אָחִיו צָרָתָהּ מוּתֶּרֶת. וְכָל־הַיְּכוֹלָה לְמָאֵן וְלֹא מֵיאֵינָה וּמֵתָה צָרָתָהּ חוֹלֶצֶת וְלֹא מִתְיַבֶּמֶת. MISHNAH: How are their co-wives permitted169To the levir in Levirate. if they die? If his daughter or one of the incest-prohibited women was married to his brother who has another wife, if his daughter died and then his brother died her co-wife is permitted. And if a woman could repudiate but did not do so, when she died her co-wife performs ḥalîṣah but cannot be married in levirate127To the brothers in levirate. The marriage of a minor except through the father is only rabbinic and cannot eliminate the biblical requirement of levirate or ḥalîṣah. But levirate cannot be tolerated since that would show that the rabbinically valid marriage is a sham..
הלכה: כֵּיצַד אִם מֵתוּ הֵן צְרוֹתֵיהֶן מוּתָּרוֹת כול׳. כֵּינִי מַתְנִיתָא כָּל הַיְּכוֹלָה לְמָאֵן וְלֹא מֵיאֵנָה וּמֵתָה צָרָתָהּ חוֹלֶצֶת וְלֹא מִתְיַבֶּמֶת. HALAKHAH: “How are their co-wives permitted if they die,” etc. That is the Mishnah: “If a woman could repudiate but did not do so, when she died her co-wife performs ḥalîṣah but cannot be married in levirate170This is the Mishnah text “when she died”, in contrast to the baraita text of the preceding Halakhah which presumes the daughter to be a widow..”