(8) باب قَوْلِ النَّبِيِّ صلى الله عليه وسلم " لاَ تَرْجِعُوا بَعْدِي كُفَّارًا، يَضْرِبُ بَعْضُكُمْ رِقَابَ بَعْضٍ
Narrated `Abdullah:
The Prophet, said, "Abusing a Muslim is Fusuq (evil doing) and killing him is Kufr (disbelief). (ID)
Reference (ID): Sahih al-Bukhari 7076 (ID)
In-book reference (ID): Book 92, Hadith 27 (ID)
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 9, Book 88, Hadith 197 (ID)