Deuteronomy 22:21-22

21then they shall bring out the damsel unto the entrance of her father's house, and the men of her city shall stone her with stones that she die: because she hath wrought infamy in Israel, committing fornication in her father's house; and thou shalt put evil away from thy midst.

22If a man be found lying with a man's wife, they shall both of them die, the man that lay with the woman, and the woman; and thou shalt put away evil from Israel.