(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." (RU)
Reference (RU): Al-Adab Al-Mufrad 429 (RU)
In-book reference (RU): Book 24, Hadith 11 (RU)
English translation (RU): Book 24, Hadith 429 (RU)