Le Coran Verset 4

وَءَاتُوا۟ ٱلنِّسَآءَ صَدُقَٰتِهِنَّ نِحْلَةًۭ ۚ فَإِن طِبْنَ لَكُمْ عَن شَىْءٍۢ مِّنْهُ نَفْسًۭا فَكُلُوهُ هَنِيٓـًۭٔا مَّرِيٓـًۭٔا

Et donnez aux épouses leur mahr, de bonne grâce. Si de bon gré, elles vous en abandonnent quelque chose, disposez-en alors à votre aise et de bon cœur.

And give unto the women (whom ye marry) free gift of their marriage portions; but if they of their own accord remit unto you a part thereof, then ye are welcome to absorb it (in your wealth).