Surah Al-Anfal — Ayah 63 (8:63)
وَأَلَّفَ بَيۡنَ قُلُوبِهِمۡۚ لَوۡ أَنفَقۡتَ مَا فِي ٱلۡأَرۡضِ جَمِيعٗا مَّآ أَلَّفۡتَ بَيۡنَ قُلُوبِهِمۡ وَلَٰكِنَّ ٱللَّهَ أَلَّفَ بَيۡنَهُمۡۚ إِنَّهُۥ عَزِيزٌ حَكِيمٞ ٦٣
English translation (Saheeh International)
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.
Brief commentary
He brought the hearts of the believers, with whom He assisted you, together after they were disunited. If you had spent all the wealth on earth to bring their disunited hearts together, you would not have been able to do so. But Allah alone brought them together. He is Mighty in His dominion and nothing can overpower Him. He is Wise in His decree, handling of affairs and sacred laws.