Deuteronomy 22:21-22

21then they are to bring the young woman out to the door of her father’s house, and the men of her city are to stone her with stones to death, because she has done a disgraceful thing in Israel, to behave like a prostitute in her father’s house. So you are to purge the evil from your midst.

22“Suppose a man is found lying with a married woman. Then both of them are to die—the man who lay with the woman and the woman. So you are to purge the evil from Israel.