Surah An-Nisa Verse 21

وَكَيْفَ تَأْخُذُونَهُ وَقَدْ أَفْضَىٰ بَعْضُكُمْ إِلَىٰ بَعْضٍ وَأَخَذْنَ مِنْكُمْ مِيثَاقًا غَلِيظًا

And how could you take it while you have gone in unto each other and they have taken from you a solemn covenant