Deuteronomy 22:21-22

21The woman must be taken to the door of her father’s home, and there the men of the town must stone her to death, for she has committed a disgraceful crime in Israel by being promiscuous while living in her parents’ home. In this way, you will purge this evil from among you.

22“If a man is discovered committing adultery, both he and the woman must die. In this way, you will purge Israel of such evil.