Deuteronomy 22:23-24

23“If a young woman who is a virgin is engaged (legally betrothed) to a man, and another man finds her in the city and is intimate with her,

24then you shall bring them both out to the gate of that city and stone them to death—the young woman because she did not cry out for help [though she was] in the city, and the man because he has violated his neighbor’s [promised] wife. So you shall remove the evil from among you.