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:
Wer seiner Schwägerin beiwohnt, sei es aus Versehen oder aus Mutwillen, sei es gezwungen oder freiwillig, selbst wenn er aus Versehen und sie aus Mutwillen, er aus Mutwillen und sie aus Versehen, er gezwungen und sie nicht gezwungen, sie gezwungen und er nicht gezwungen handelt, gleichviel ob er sie dabei nur entblösst oder die Beiwohnung vollendet — erwirbt sie als Gattin; auch macht hierbei die Art der Beiwohnung keinen Unterschied.
Jerusalem Talmud Yevamot
MISHNAH: If somebody comes to his sister-in-law1Widow of his childless brother., whether in error2He did not realize that she was his sister-in-law., or criminally3Either he intended extramarital intercourse or he did not know that she was permitted to him., or under duress4Someone forced him to have intercourse., or willingly5He intended to fulfill the biblical commandment. That case is not needed but it is mishnaic style always to mention באונס וברצון together., even if he is in error and she acts criminally, or he does it criminally but she is in error, or he is under duress but she is not, or she is under duress but he is not, whether he touched or completed6The exact meaning of this term is discussed in the Halakhah. Cf. also Chapter 4, Note 59., he acquired her and there is no difference between intercourse and intercourse.