(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." (AR)
Reference (AR): Al-Adab Al-Mufrad 431 (AR)
In-book reference (AR): Book 24, Hadith 13 (AR)
English translation (AR): Book 24, Hadith 431 (AR)