Jerusalem Talmud Gittin 8.6

משנה: הַכּוֹנֵס אֶת יְבִמְתּוֹ וְהָלְכָה צָרָתָהּ וְנִישֵּׂאת לְאַחֵר וְנִמְצְאָה זֹאת שֶׁהִיא אַיְלוֹנִית תֵּצֵא מִזֶּה וּמִזֶּה וְכָל הַדְּרָכִים הָאֵילּוּ בָהּ.

MISHNAH: If somebody married his sister-in-law while her co-wife went and married somebody else, if the sister-in-law turns out to be a she-ram, the co-wife shall be divorced from both of them and all the aforementioned consequences apply to her.

הלכה: הַכּוֹנֵס אֶת יְבִמְתּוֹ כול׳. לֹא הָיְתָה צְרִיכָה לְהִינָּשֵׂא אֶלָּא לְהִתְיַיבֶּם. וְזוֹ הִיא יְבָמָה שֶׁנִּיסֵּית בְּלֹא חֲלִיצָה. רִבִּי יִרְמְיָה אָמַר. זֶה חוֹלֵץ וְזֶה מְקַיֵים. רִבִּי יְהוּדָה בֶּן פָּזִי בְשֵׁם רִבִּי יוֹחָנָן. תֵּצֵא. רִבִּי יוֹסֵי שָׁאַל לְרִבִּי פִינְחָס. הֵיךְ רִבִּי סָבַר. אָמַר לֵיהּ. כְּרִבִּי יִרְמְיָה. אָמַר לֵיהּ. חֲזוֹר בָּךְ. דִּלֹא כֵן אֲנָא כְתַב עֲלָךְ זָקֵן מַמְרֵא. אָמַר רִבִּי זְבִידָא. מַתְנִיתָא מְסַיְיעָא לְרִבִּי יוֹחָנָן. תֵּצֵא מִזֶּה וּמִזֶּה וּשְׁלֹשָׁה עָשָׂר דְּבָרִים בָּהּ. דִּבְרֵי רִבִּי מֵאִיר שֶׁאָמַר מִשּׁוּם רִבִּי עֲקִיבָה. וַחֲכָמִים אוֹמְרִים. אֵין מַמְזֵר מִיְּבָמָה. הָא לָצֵאת תֵּצֵא.

HALAKHAH: “If somebody married his sister-in-law,” etc. If she should not have married but entered levirate, this is the case of a sister-in-law who married without ḥalîṣah. Rebbi Jeremiah said, this man performs ḥalīṣah, the other one keeps her. Rebbi Jehudah ben Pazi in the name of Rebbi Joḥanan: She must leave. Rebbi Yose asked Rebbi Phineas, how does the rabbi hold? He said, with Rebbi Jeremiah. He said to him, change your mind, for otherwise I shall publicly call you a rebellious Elder. Rebbi Zevidah said, a baraita supports Rebbi Joḥanan: “She must leave both of them and the thirteen items apply to her, following Rebbi Meïr who said it in the name of Rebbi Aqibah. But the Sages say, there is no bastard from a sister-in-law.” Therefore she must leave.