וְאִ֗ישׁ אֲשֶׁ֤ר יִנְאַף֙ אֶת־אֵ֣שֶׁת אִ֔ישׁ אֲשֶׁ֥ר יִנְאַ֖ף אֶת־אֵ֣שֶׁת רֵעֵ֑הוּ מֽוֹת־יוּמַ֥ת הַנֹּאֵ֖ף וְהַנֹּאָֽפֶת׃
And the man that committeth adultery with another man’s wife, even he that committeth adultery with his neighbour’s wife, both the adulterer and the adulteress shall surely be put to death.
Leviticus
With your friends wife you shall not lie carnally, to defile yourself through her.
Deuteronomy
If a man is found having intercourse with a woman who is the wife of a man, even both of them shall die—the man who had intercourse with the woman and the woman—and you will eliminate the evil from Yisroel.