وَإِن فَاتَكُمْ شَيْءٌ مِّنْ أَزْوَاجِكُمْ إِلَى الْكُفَّارِ فَعَاقَبْتُمْ فَآتُوا الَّذِينَ ذَهَبَتْ أَزْوَاجُهُم مِّثْلَ مَا أَنفَقُوا وَاتَّقُوا اللَّهَ الَّذِي أَنتُم بِهِ مُؤْمِنُونَ
[60:11]
And if anything (out of the dowries) of your wives has passed away from you to the unbelievers, then your turn comes, give to those whose wives have gone away the like of what they have spent, and be careful of (your duty to) Allah in Whom you believe.
And if any of your wives deserts you to the Unbelievers, and ye have an accession (by the coming over of a woman from the other side), then pay to those whose wives have deserted the equivalent of what they had spent (on their dower). And fear Allah, in Whom ye believe.
And if any of your wives have gone from you unto the disbelievers and afterward ye have your turn (of triumph), then give unto those whose wives have gone the like of that which they have spent, and keep your duty to Allah in Whom ye are believers.