Deuteronomy 22:22-24

22If a man is caught having sexual intercourse with a married woman, both that man and the woman must die. You must get rid of this evil in Israel.

23This is what you must do when a man has sexual intercourse with a virgin who is engaged to another man. If this happens in a city,

24take them to the gate of the city and stone them to death. The girl must die because she was in a city and didn’t scream for help. The man must die because he had sex with another man’s wife. You must get rid of this evil.