English
Narrated `Abdullah:The Prophet, said, "Abusing a Muslim is Fusuq (evil doing) and killing him is Kufr (disbelief)
Translation: Dr. Muhammad Muhsin Khan. Digital text from the sunnah.com edition; formatting may differ from the Darussalam print edition.
العربية
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 ".