Verse 63

وَأَلَّفَ بَيْنَ قُلُوبِهِمْ لَوْ أَنفَقْتَ مَا فِى ٱلْأَرْضِ جَمِيعًا مَّآ أَلَّفْتَ بَيْنَ قُلُوبِهِمْ وَلَـٰكِنَّ ٱللَّهَ أَلَّفَ بَيْنَهُمْ إِنَّهُۥ عَزِيزٌ حَكِيمٌ

And He reconciled their hearts. Had you spent everything on the land, you would not have been able to reconcile their hearts, however, God reconciled them. Indeed He is Almighty, All Wise.