Leviticus 20:10; Deuteronomy 22:20-22

10 "If a man commits adultery with the wife of his neighbor, both the adulterer and the adulteress shall be put to death.

20 But if the thing is true, that the tokens of virginity were not found in the young woman,

21 then they shall bring out the young woman to the door of her father's house, and the men of her city shall stone her to death with stones, because she has wrought folly in Israel by playing the harlot in her father's house; so you shall purge the evil from the midst of you.

22 "If a man is found lying with the wife of another man, both of them shall die, the man who lay with the woman, and the woman; so you shall purge the evil from Israel.