Sahih Muslim Book - 33, Hadith - 4786

حَدَّثَنَا شَيْبَانُ بْنُ فَرُّوخَ حَدَّثَنَا جَرِيرٌ - يَعْنِى ابْنَ حَازِمٍ - حَدَّثَنَا غَيْلاَنُ بْنُ جَرِيرٍ عَنْ أَبِى قَيْسِ بْنِ رِيَاحٍ عَنْ أَبِى هُرَيْرَةَ عَنِ النَّبِىِّ -صلى الله عليه وسلم- أَنَّهُ قَالَ « مَنْ خَرَجَ مِنَ الطَّاعَةِ وَفَارَقَ الْجَمَاعَةَ فَمَاتَ مَاتَ مِيتَةً جَاهِلِيَّةً وَمَنْ قَاتَلَ تَحْتَ رَايَةٍ عُمِّيَّةٍ يَغْضَبُ لِعَصَبَةٍ أَوْ يَدْعُو إِلَى عَصَبَةٍ أَوْ يَنْصُرُ عَصَبَةً فَقُتِلَ فَقِتْلَةٌ جَاهِلِيَّةٌ وَمَنْ خَرَجَ عَلَى أُمَّتِى يَضْرِبُ بَرَّهَا وَفَاجِرَهَا وَلاَ يَتَحَاشَ مِنْ مُؤْمِنِهَا وَلاَ يَفِى لِذِى عَهْدٍ عَهْدَهُ فَلَيْسَ مِنِّى وَلَسْتُ مِنْهُ ».

It was narrated from Abu Hurairah that the Prophet (s.a.w) said: "Whoever rebels against obedience and splits away from the Jama'ah (main body of the Muslims) and dies (in that state) has died a death of Jahiliyyah. Whoever fights for no real cause, getting angry for the sake of tribalism, calling for tribalism, or supporting tribalism, and is killed, dies in a state of Jahiliyyah. Whoever rebels against my Ummah, striking righteous and wicked alike, and does not spare the believers, and does not pay attention to anyone who has a covenant of protection with the Muslims, he is not of me and I am not of him."