(202) بَابُ سِبَابِ الْمُسْلِمِ فُسُوقٌ
'Abdullah reported that the Prophet, may Allah bless him and granthim peace, said, "Reviling a Muslim is deviant behaviour and killing himis disbelief." (FR)
Reference (FR): Al-Adab Al-Mufrad 431 (FR)
In-book reference (FR): Book 24, Hadith 13 (FR)
English translation (FR): Book 24, Hadith 431 (FR)