Deuteronomy 22:28-29

28Perhaps a man may meet a girl who has not had sex with anyone before. She has not yet promised to marry anyone. The man may be too strong and he has sex with her.

29If that happens, the man must pay 50 pieces of silver to the girl's father. He must also marry the girl because he has had sex with her. He may never send her away as long as he lives.