Deuteronomy 22:21-22

21then they shall bring out the girl to the doorway of her father’s house, and the men of her city shall stone her 1to death because she has 2committed an act of folly in Israel by playing the harlot in her father’s house; thus 3you shall purge the evil from among you.

22“4If a man is found lying with a married woman, then both of them shall die, the man who lay with the woman, and the woman; thus you shall purge the evil from Israel.