Surah An-Nisa, verse 24

۞ وَٱلْمُحْصَنَـٰتُ مِنَ ٱلنِّسَآءِ إِلَّا مَا مَلَكَتْ أَيْمَـٰنُكُمْ ۖ كِتَـٰبَ ٱللَّهِ عَلَيْكُمْ ۚ وَأُحِلَّ لَكُم مَّا وَرَآءَ ذَٰلِكُمْ أَن تَبْتَغُوا۟ بِأَمْوَٰلِكُم مُّحْصِنِينَ غَيْرَ مُسَـٰفِحِينَ ۚ فَمَا ٱسْتَمْتَعْتُم بِهِۦ مِنْهُنَّ فَـَٔاتُوهُنَّ أُجُورَهُنَّ فَرِيضَةً ۚ وَلَا جُنَاحَ عَلَيْكُمْ فِيمَا تَرَٰضَيْتُم بِهِۦ مِنۢ بَعْدِ ٱلْفَرِيضَةِ ۚ إِنَّ ٱللَّهَ كَانَ عَلِيمًا حَكِيمًا ﴿٢٤﴾

4:24 Also [prohibited are] married women except female slaves you may own. This is Allah’s commandment to you. All women other than these are lawful for you to marry with your wealth in a legal marriage, not adultery. When you consummate your marriage with them, give them their due dowries. There is no sin on you to mutually agree after the [initial] agreement. And Allah is All-Knowing, All-Wise