وَأَلَّفَ بَيْنَ قُلُوبِهِمْ لَوْ أَنفَقْتَ مَا فِي الأَرْضِ جَمِيعاً مَّا أَلَّفَتْ بَيْنَ قُلُوبِهِمْ وَلَكِنَّ اللّهَ أَلَّفَ بَيْنَهُمْ إِنَّهُ عَزِيزٌ حَكِيمٌ
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سورة الأنفال
(8/63) And He has united their hearts (with love). If you had spent all that is in the earth, you could not have united their hearts. And but Allah has united them. Certainly He is All-Mighty, All-Wise.
Surah Al-Anfal