סימן קמה סעיף יז
הַנֶּחְשָׁד עַל אֵשֶׁת אִישׁ וְגֵרְשָׁהּ בַּעְלָהּ אוֹ שֶׁמֵּת, הֲרֵי זוֹ אֲסוּרָה לָזֶה הַנֶּחְשָׁד. שֶׁכְּשֵׁם שֶׁנֶאֶסְרָה לַבַּעַל, כָּךְ נֶאֶסְרָה לַבּוֹעֵל. וַאֲפִלּוּ גֵרְשָׁה בַּעְלָהּ רַק מֵחֲמַת דָּבָר מְכֹעָר שֶׁשָׁמַע עָלֶיהָ עִם הַנֶחְשָׁד, אָסוּר לְהַנֶּחְשָׁד שֶיִשָּׂא אוֹתָהּ.
If a man is suspected of committing adultery with a married woman, and her husband divorced her or died, she is forbidden to [marry] that suspected man,12This is a Biblical ordinance, and refers only when her husband had warned her that she not dare be alone with that man, and she was caught being alone with him. Although there were no witnesses that actual adultery had been committed, nonetheless, she is called a sotah and is forbidden to her husband (until she is proven innocent by the ritual involving drinking the Sotah water in the Beis Hamikdash). Subsequently, she is also forbidden to the suspect even after she is divorced or widowed. for just as she became forbidden to her husband, so too she is forbidden to the one who committed adultery with her. Even if her husband divorced her only because of improper conduct that was rumored about her regarding that suspected man, the suspect is forbidden to marry her.13In this case it is a Rabbinic injunction.
תנא דבי אליהו כל השונה הלכות בכל יום מובטח לו שהוא בן העולם הבא שנאמר הליכות עולם לו אל תקרי הליכות אלא הלכות (נדה ע"ג.)