﴿ وَإِن طَآئِفَتَانِ مِنَ ٱلْمُؤْمِنِينَ ٱقْتَتَلُوا۟ فَأَصْلِحُوا۟ بَيْنَهُمَا ۖ فَإِنۢ بَغَتْ إِحْدَىٰهُمَا عَلَى ٱلْأُخْرَىٰ فَقَٰتِلُوا۟ ٱلَّتِى تَبْغِى حَتَّىٰ تَفِىٓءَ إِلَىٰٓ أَمْرِ ٱللَّهِ ۚ فَإِن فَآءَتْ فَأَصْلِحُوا۟ بَيْنَهُمَا بِٱلْعَدْلِ وَأَقْسِطُوٓا۟ ۖ إِنَّ ٱللَّهَ يُحِبُّ ٱلْمُقْسِطِينَ ﴾

“Hence, if two groups of believers fall to fighting, make peace between them; but then, if one of the two [groups] goes on acting wrongfully towards the other, fight against the one that acts wrongfully until it reverts to God’s commandment; and if they revert, make peace between them with justice, and deal equitably [with them]: for verily, God loves those who act equitably!”

(And if two parties of believers fall to fighting, then make peace between them�) [49:9]. Muhammad ibn Ahmad ibn Ja�far al-Nahwi informed us> Muhammad ibn Ahmad ibn Sinan al-Muqri�> Ahmad ibn �Ali al-Mawsili> Ishaq ibn Abi Isra�il> Mu�tamir ibn Sulayman> his father> Anas who related: �I said: �O Prophet of Allah, why do you not visit �Abd Allah ibn Ubayy?� The Prophet, Allah bless him and give him peace, decided to go and visit him. He mounted an ass and the Muslims walked with him. It happened that the ground was full of manure. So when the Prophet, Allah bless him and give him peace, reached �Abd Allah ibn Ubayy, the latter said: �Keep away from me, the staunch of your ass is offending me�. A man from the Helpers said to him: �By Allah, the ass of the Messenger of Allah, Allah bless him and give him peace, smells better than you�. One of the men of �Abd Allah ibn Ubayy got angry; then the men of both parties became angry because of what was said. They exchanged blows and hurled leafless palm leaves and sandals at each others. We heard that it is about them that (And if two parties of believers fall to fighting�) was revealed�. This was narrated by Bukhari from Musaddid and by Muslim from Muhammad ibn �Abd al-A�la; both Musaddid and Muhammad ibn �Abd al-A�la related it from al-Mu�tamir.