Surat Al Anfal: (63-64)

{وَأَلَّفَ بَيْنَ قُلُوبِهِمْ لَوْ أَنفَقْتَ مَا فِي الأَرْضِ جَمِيعاً مَّا أَلَّفَتْ بَيْنَ قُلُوبِهِمْ وَلَـكِنَّ اللّهَ أَلَّفَ بَيْنَهُمْ إِنَّهُ عَزِيزٌ حَكِيمٌ} [الأنفال : 63]

63- Allah is the One who combined together the hearts of Muslims despite their past rivalries and blind fanaticism especially Awas and Khazraj who were about to vanish because of the frequent wars between them. Then Islam combined them, made them brothers, and they started to help one another to goodness and the truth. If you had spent the funds of the earth to strengthen the ties of intimacy among them and combine their hearts, you could not be able to do that because of the severe enmity between them. However, Allah with His Kindness and Mercy established that harmony and strengthened the spirit of love and brotherhood among them. Verily, Allah (Glory be to Him) is All-Able to do that, Cherishable, and Wise who can run matters in the best manner.

{يَا أَيُّهَا النَّبِيُّ حَسْبُكَ اللّهُ وَمَنِ اتَّبَعَكَ مِنَ الْمُؤْمِنِينَ} [الأنفال : 64]

64- O honorable Prophet, Allah shall suffice you and manage all your affairs and shall help you as well as the believers who have followed you from the Migrants and the Supporters.