Quran 33:52 from Surah Al-Ahzaab on Divine Marvels.
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
English translation: (It is) not lawful for you (to marry) women after (this) after (this) and not to exchange them for (other) wives even if pleases you their beauty except whom you rightfully possess you rightfully possess And Allah is And Allah is over all things an Observer
Transliteration: la yahillu laka al-nisau min ba'du wala an tabaddala bihinna min azwajin walaw a'jabaka hus'nuhunna illa ma malakat yaminuka wakana al-lahu ala kulli shayin raqiban