(27) باب قِتَالِ الْمُسْلِمِ
It was narrated that 'Abdullah said:
"Fighting a believer is Kufr and defaming him is evildoing." (IT)
Reference (IT): Sunan an-Nasa'i 4113 (IT)
In-book reference (IT): Book 37, Hadith 148 (IT)
English translation (IT): Vol. 5, Book 37, Hadith 4118 (IT)