وَأَلَّفَ بَينَ قُلوبِهِم ۚ لَو أَنفَقتَ ما فِي الأَرضِ جَميعًا ما أَلَّفتَ بَينَ قُلوبِهِم وَلـٰكِنَّ اللَّهَ أَلَّفَ بَينَهُم ۚ إِنَّهُ عَزيزٌ حَكيمٌ

And brought together their hearts. If you had spent all that is in the earth, you could not have brought their hearts together; but Allah brought them together. Indeed, He is Exalted in Might and Wise.