الحجرٰت — Al-Hujurat Ayat 9
وَاِنْ طَاۤىِٕفَتٰنِ مِنَ الْمُؤْمِنِيْنَ اقْتَتَلُوْا فَاَصْلِحُوْا بَيْنَهُمَاۚ فَاِنْۢ بَغَتْ اِحْدٰىهُمَا عَلَى الْاُخْرٰى فَقَاتِلُوا الَّتِيْ تَبْغِيْ حَتّٰى تَفِيْۤءَ اِلٰٓى اَمْرِ اللّٰهِ ۖفَاِنْ فَاۤءَتْ فَاَصْلِحُوْا بَيْنَهُمَا بِالْعَدْلِ وَاَقْسِطُوْا ۗاِنَّ اللّٰهَ يُحِبُّ الْمُقْسِطِيْنَ
Wa in ṭā'ifatāni minal-mu'minīnaqtatalū fa aṣliḥū bainahumā, fa im bagat iḥdāhumā ‘alal-ukhrā fa qātilul-latī tabgī ḥattā tafī'a ilā amrillāh(i), fa in fā'at fa aṣliḥū bainahumā bil-‘adli wa aqsiṭū, innallāha yuḥibbul-muqsiṭīn(a).
"And if two factions among the believers should fight, then make settlement between the two. But if one of them oppresses the other, then fight against the one that oppresses until it returns to the ordinance of Allah. And if it returns, then make settlement between them in justice and act justly. Indeed, Allah loves those who act justly."