Surah Al-Ahzab · Ayah 52

لَّا يَحِلُّ لَكَ ٱلنِّسَآءُ مِنۢ بَعْدُ وَلَآ أَن تَبَدَّلَ بِهِنَّ مِنْ أَزْوَٰجٍۢ وَلَوْ أَعْجَبَكَ حُسْنُهُنَّ إِلَّا مَا مَلَكَتْ يَمِينُكَ ۗ وَكَانَ ٱللَّهُ عَلَىٰ كُلِّ شَىْءٍۢ رَّقِيبًۭا

Laa yahillu lakan nisaaa'u mim ba'du wa laaa an tabaddala bihinna min azwaajinw wa law ajabaka husnuhunna illaa maa malakat yameenukk; wa kaanal laahu 'alaa kulli shai'ir Raqeeba

Not lawful to you, [O Muhammad], are [any additional] women after [this], nor [is it] for you to exchange them for [other] wives, even if their beauty were to please you, except what your right hand possesses. And ever is Allah, over all things, an Observer.