71. The Believers should not fight among themselves

Surah No. 49, Al Hujurat, Ayats No. 9 & 10

وَإِن طَائِفَتَانِ مِنَ الْمُؤْمِنِينَ اقْتَتَلُوا فَأَصْلِحُوا بَيْنَهُمَا فَإِن بَغَتْ إِحْدَاهُمَا عَلَى

الْأُخْرَى فَقَاتِلُوا الَّتِي تَبْغِي حَتَّى تَفِيءَ إِلَى أَمْرِ اللَّهِ فَإِن فَاءتْ فَأَصْلِحُوا

oبَيْنَهُمَا بِالْعَدْلِ وَأَقْسِطُوا إِنَّ اللَّهَ يُحِبُّ الْمُقْسِطِينَ

o إِنَّمَا الْمُؤْمِنُونَ إِخْوَةٌ فَأَصْلِحُوا بَيْنَ أَخَوَيْكُمْ وَاتَّقُوا اللَّهَ لَعَلَّكُمْ تُرْحَمُونَ

Translation :

If two parties among the Believers fall into fighting, then make peace between them: but if one of them transgresses beyond limit against the other, then you fight against that party which is transgressor until it complies with the command of Allah; when it complies, then make peace between them with justice, and be fair: for Allah loves those who are fair.

In fact, the Believers are brothers of each other (In Religion): So make peace and reconciliation between your two brothers: And fear Allah that you may receive Mercy.