Qur'an 8:63

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

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

Al-Anfaal 8:63 · Saheeh International