Quran 4:21 from Surah An-Nisaa on Divine Marvels.
وَكَيۡفَ تَأۡخُذُونَهُۥ وَقَدۡ أَفۡضَىٰ بَعۡضُكُمۡ إِلَىٰ بَعۡضٖ وَأَخَذۡنَ مِنكُم مِّيثَٰقًا غَلِيظٗا
English translation: And how could you take it when surely has gone one of you to another and they have taken from you covenant strong
Transliteration: wakayfa takhudhunahu waqad afda ba'dukum ila ba'din wa-akhadhna minkum mithaqan ghalizan