Sahih al-Bukhari 7076
Narrated 'Abdullah:
The Prophet, said, "Abusing a Muslim is Fusuq (evil doing) and killing him is Kufr (disbelief)."
حَدَّثَنَا عُمَرُ بْنُ حَفْصٍ، حَدَّثَنِي أَبِي، حَدَّثَنَا الأَعْمَشُ، حَدَّثَنَا شَقِيقٌ، قَالَ قَالَ عَبْدُ اللَّهِ قَالَ النَّبِيُّ ﷺ
" سِبَابُ الْمُسْلِمِ فُسُوقٌ، وَقِتَالُهُ كُفْرٌ ".
Classification
Sahih (Authentic)
References
Sahih al-Bukhari 7076
Sahih al-Bukhari Vol. 9, Book of Trials & Tribulations, Hadith 197