(202) بَابُ سِبَابِ الْمُسْلِمِ فُسُوقٌ
Sa'id ibn Malik reported that the Prophet, may Allah bless himand grant him peace, said, "Reviling a Muslim is deviant behaviour." (IT)
Reference (IT): Al-Adab Al-Mufrad 429 (IT)
In-book reference (IT): Book 24, Hadith 11 (IT)
English translation (IT): Book 24, Hadith 429 (IT)