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