سورة An-Nisa 4:21

وَكَيْفَ تَأْخُذُونَهُۥ وَقَدْ أَفْضَىٰ بَعْضُكُمْ إِلَىٰ بَعْضٍۢ وَأَخَذْنَ مِنكُم مِّيثَـٰقًا غَلِيظًۭا ٢١

And how could you take it back after having enjoyed each other intimately and she has taken from you a firm commitment