Al Ahzab Ayah 52

لَّا يَحِلُّ لَكَ ٱلنِّسَآءُ مِنۢ بَعْدُ وَلَآ أَن تَبَدَّلَ بِهِنَّ مِنْ أَزْوَٲجٍ وَلَوْ أَعْجَبَكَ حُسْنُهُنَّ إِلَّا مَا مَلَكَتْ يَمِينُكَۗ وَكَانَ ٱللَّهُ عَلَىٰ كُلِّ شَىْءٍ رَّقِيبًا ٥٢ It is not lawful for you ?O Prophet? to marry more women after this, nor can you replace any of your present wives with another, even if her beauty may attract you—except those ?bondwomen? in your possession. And Allah is ever Watchful over all things.