Surah Al-Ahzab, Verse 52

لَّا يَحِلُّ لَكَ ٱلنِّسَآءُ مِنۢ بَعۡدُ وَلَآ أَن تَبَدَّلَ بِهِنَّ مِنۡ أَزۡوَٰجٖ وَلَوۡ أَعۡجَبَكَ حُسۡنُهُنَّ إِلَّا مَا مَلَكَتۡ يَمِينُكَۗ وَكَانَ ٱللَّهُ عَلَىٰ كُلِّ شَيۡءٖ رَّقِيبٗا٥٢

lā yaḥillu laka l-nisāu min baʿdu walā an tabaddala bihinna min azwājin walaw aʿjabaka ḥus'nuhunna illā mā malakat yamīnuka wakāna l-lahu ʿalā kulli shayin raqīban

Not lawful to you, [O Muḥammad], 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 Allāh, over all things, an Observer.