Deuteronomy 22:21-22

21then they shall bring out the damsel to the door of her father’s house, and the men of her city shall stone her with stones that she die: because she hath wrought folly in Israel, to play the harlot in her father’s house: so shalt thou put away the evil from the midst of thee.

22If a man be found lying with a woman married to an husband, then they shall both of them die, the man that lay with the woman, and the woman: so shalt thou put away the evil from Israel.