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 prohibited are) the women already bound in marriage, except the bondwomen you come to own. It has been written by Allah for you. All (women), except these, have been permitted for you to seek (to marry) through your wealth, binding yourself, (in marriage) and not only for lust. So, to those of them whose company you have enjoyed, give their dues (dower) as obligated. There is no sin on you in what you mutually agree upon after the (initial) agreement. Surely, Allah is All-Knowing, All-Wise.