وَإِنْ أَرَدتُّمُ اسْتِبْدَالَ زَوْجٍ مَّكَانَ زَوْجٍ وَآتَيْتُمْ إِحْدَاهُنَّ قِنطَارًا فَلاَ تَأْخُذُواْ مِنْهُ شَيْئًا أَتَأْخُذُونَهُ بُهْتَاناً وَإِثْماً مُّبِيناً
[4:20]
And if you wish to have (one) wife in place of another and you have given one of them a heap of gold, then take not from it anything; would you take it by slandering (her) and (doing her) manifest wrong?
But if ye decide to take one wife in place of another, even if ye had given the latter a whole treasure for dower, Take not the least bit of it back: Would ye take it by slander and manifest wrong?
And if ye wish to exchange one wife for another and ye have given unto one of them a sum of money (however great), take nothing from it. Would ye take it by the way of calumny and open wrong?