Surah Al-Ahzab, verse 50

يَـٰٓأَيُّهَا ٱلنَّبِىُّ إِنَّآ أَحْلَلْنَا لَكَ أَزْوَٰجَكَ ٱلَّـٰتِىٓ ءَاتَيْتَ أُجُورَهُنَّ وَمَا مَلَكَتْ يَمِينُكَ مِمَّآ أَفَآءَ ٱللَّهُ عَلَيْكَ وَبَنَاتِ عَمِّكَ وَبَنَاتِ عَمَّـٰتِكَ وَبَنَاتِ خَالِكَ وَبَنَاتِ خَـٰلَـٰتِكَ ٱلَّـٰتِى هَاجَرْنَ مَعَكَ وَٱمْرَأَةً مُّؤْمِنَةً إِن وَهَبَتْ نَفْسَهَا لِلنَّبِىِّ إِنْ أَرَادَ ٱلنَّبِىُّ أَن يَسْتَنكِحَهَا خَالِصَةً لَّكَ مِن دُونِ ٱلْمُؤْمِنِينَ ۗ قَدْ عَلِمْنَا مَا فَرَضْنَا عَلَيْهِمْ فِىٓ أَزْوَٰجِهِمْ وَمَا مَلَكَتْ أَيْمَـٰنُهُمْ لِكَيْلَا يَكُونَ عَلَيْكَ حَرَجٌ ۗ وَكَانَ ٱللَّهُ غَفُورًا رَّحِيمًا ﴿٥٠﴾

33:50 O Prophet, We have made lawful for you your wives whose dowries you have paid; any bondwomen you may own from the prisoners of war whom Allah has bestowed upon you; daughters of your paternal uncle, daughters of your paternal aunts, daughters of your maternal uncle, daughters of your maternal aunts who have migrated with you; and a believing woman who offers herself to the Prophet [without dowry] if the Prophet wishes to marry her, [this is] exclusively for you, not for the rest of the believers. We know well what We have ordained for them concerning their marriages and the bondwomen they may own, so that there would be no discomfort for you. And Allah is All-Forgiving, Most Merciful