Al Hujurat Ayah 9

وَإِن طَآئِفَتَانِ مِنَ ٱلْمُؤْمِنِينَ ٱقْتَتَلُواْ فَأَصْلِحُواْ بَيْنَهُمَا‌ۖ فَإِنۢ بَغَتْ إِحْدَٮٰهُمَا عَلَى ٱلْأُخْرَىٰ فَقَـٰتِلُواْ ٱلَّتِى تَبْغِى حَتَّىٰ تَفِىٓءَ إِلَىٰٓ أَمْرِ ٱللَّهِ‌ۚ فَإِن فَآءَتْ فَأَصْلِحُواْ بَيْنَهُمَا بِٱلْعَدْلِ وَأَقْسِطُوٓاْ‌ۖ إِنَّ ٱللَّهَ يُحِبُّ ٱلْمُقْسِطِينَ ٩ And if two groups of believers fight each other, then make peace between them. But if one of them transgresses against the other, then fight against the transgressing group until they ?are willing to? submit to the rule of Allah. If they do so, then make peace between both ?groups? in all fairness and act justly. Surely Allah loves those who uphold justice.