The Mishnah
יבמות ו׳Yevamot 6
Perek 6 of 16 in Yevamot — 6 mishnayot
Mishnah 1א׳
הַבָּא עַל יְבִמְתּוֹ, בֵּין בְּשׁוֹגֵג, בֵּין בְּמֵזִיד, בֵּין בְּאֹנֶס, בֵּין בְּרָצוֹן, אֲפִלּוּ הוּא שׁוֹגֵג וְהִיא מְזִידָה, הוּא מֵזִיד וְהִיא שׁוֹגֶגֶת, הוּא אָנוּס וְהִיא לֹא אֲנוּסָה, הִיא אֲנוּסָה וְהוּא לֹא אָנוּס, אֶחָד הַמְעָרֶה וְאֶחָד הַגּוֹמֵר, קָנָה, וְלֹא חָלַק בֵּין בִּיאָה לְבִיאָה:
[If] one had relations with his Yevama [a woman whose husband died childless and whose brother-in-law must marry or dismiss her] he acquires [marries her thereby]. [This is so] whether he [had relations] unknowingly [he thought she was somebody else] or knowingly, by force [he was compelled by somebody else] or willingly. [This is so] even [if] he [acted] unknowingly and she [acted] knowingly, [or] he [acted] knowingly and she [acted] unknowingly, [or] he [acted] by force and she did not [act] by force, [or] she [acted] by force and he did not [act] by force. [This is so] whether he did not complete the intercourse or he did complete the intercourse. And it makes no difference whether there was [natural] relations or [unnatural] relations.
Mishnah 2ב׳
וְכֵן הַבָּא עַל אַחַת מִכָּל הָעֲרָיוֹת שֶׁבַּתּוֹרָה, אוֹ פְסוּלוֹת, כְּגוֹן אַלְמָנָה לְכֹהֵן גָּדוֹל, גְּרוּשָׁה וַחֲלוּצָה לְכֹהֵן הֶדְיוֹט, מַמְזֶרֶת וּנְתִינָה לְיִשְׂרָאֵל, בַּת יִשְׂרָאֵל לְמַמְזֵר וּלְנָתִין, פָּסַל. וְלֹא חָלַק בֵּין בִּיאָה לְבִיאָה:
Similarly, [if] one had relations with any of those with whom such unions are forbidden by the Torah, or with a woman who is disqualified for him - such as a widow to a High Priest or a divorced woman or a Chalutzah [a woman who performs Chalitzah] to a common priest, or a Mamzeret [the offspring of a severely prohibited union between a Jewish man and woman] or a Netinah [a member of a caste of Temple servants historically descended from the Gibeonites] to a Jew, she is disqualified [from later marrying a priest]. And it makes no difference whether there was [natural] relations or [unnatural] relations.
Mishnah, Torat Emet 357 edition, via Sefaria — public domain
English: Sefaria Community Translation — CC0