An-Nisa 4:24 ۞ والمحصنات من النساء الا ما ملكت ايمانكم كتاب الله عليكم واحل لكم ما وراء ذالكم ان تبتغوا باموالكم محصنين غير مسافحين فما استمتعتم به منهن فاتوهن اجورهن فريضة ولا جناح عليكم فيما تراضيتم به من بعد الفريضة ان الله كان عليما حكيما ٢٤

Also (forbidden are) women already married, except those (slaves) whom your right hands possess. Thus has Allâh ordained for you. All others are lawful, provided you seek (them in marriage) with Mahr (bridal-money given by the husband to his wife at the time of marriage) from your property, desiring chastity, not committing illegal sexual intercourse, so with those of whom you have enjoyed sexual relations, give them their Mahr as prescribed; but if after a Mahr is prescribed, you agree mutually (to give more), there is no sin on you. Surely, Allâh is Ever All-Knowing, All-Wise.