Afflictions and the End of the World
92/8. Chapter:
“Do not renegade as disbelievers after me by striking the neck of one another.”
Sahih Bukhari
حَدَّثَنَا عُمَرُ بْنُ حَفْصٍ، حَدَّثَنِي أَبِي، حَدَّثَنَا الأَعْمَشُ، حَدَّثَنَا شَقِيقٌ، قَالَ قَالَ عَبْدُ اللَّهِ قَالَ النَّبِيُّ صلى الله عليه وسلم " سِبَابُ الْمُسْلِمِ فُسُوقٌ، وَقِتَالُهُ كُفْرٌ ".
Narrated `Abdullah: The Prophet, said, "Abusing a Muslim is Fusuq (evil doing) and killing him is Kufr (disbelief).
Reference : Sahih al-Bukhari 7076In-book reference : Book 92, Hadith 27USC-MSA web (English) reference : Vol. 9, Book 88, Hadith 197