Deuteronomy 22:22-24

22“1If a man is found sleeping with a married woman, then both of them shall die, the man who slept with the woman, and the woman; so you shall eliminate the evil from Israel.

23“2If there is a girl who is a virgin 3betrothed to a man, and another man finds her in the city and sleeps with her, 24then you shall bring them both out to the gate of that city and you shall stone them 4to death: the girl, because she did not cry out for help though she was in the city, and the man, because he has violated his neighbor’s wife. So you shall eliminate the evil from among you.