הלכה על דברים 22:29

The commandment on the rapist to marry the one he has raped: That we have been commanded that one who rapes a virgin maiden must marry her as a wife and that he must give to her father fifty silver [shekel-coins], as it states (Deuteronomy 22:29), "And the man who lays with her shall pay the maiden's father fifty [coins of] silver."

That he not divorce her all of his days: That the rapist is forever prevented from divorcing the one he raped. And about this is it stated (Deuteronomy 22:29), "because he has violated her, he cannot send her away all of his days."