but if you intend to replace a wife by another and you have given one of them a cantar as mahr take not the least bit of it back would you take it wrongfully without a right and a manifest sin?
وإن أردتم استبدال زوج مكان زوج وآتيتم إحداهن قنطارا فلا تأخذوا منه شيئا أتأخذونه بهتانا وإثما مبينا