(27) باب قِتَالِ الْمُسْلِمِ
It was narrated that 'Abdullah said:
"Defaming a Muslim is evildoing and fighting him is Kufr." (Sahih Mawquf) (ID)
Reference (ID): Sunan an-Nasa'i 4105 (ID)
In-book reference (ID): Book 37, Hadith 140 (ID)
English translation (ID): Vol. 5, Book 37, Hadith 4110 (ID)