Kur’an 33:52 — sura Al-Ahzab, 52. ajet

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

Od sada ti nisu dopuštene druge žene, ni da umjesto njih neku drugu uzmeš, makar te i zadivila ljepota njihova, osim onih koje postanu robinje tvoje. – A Allah na sve motri.

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