(15) باب مَا جَاءَ سِبَابُ الْمُسْلِمِ فُسُوقٌ
Narrated Ibn Mas'ud:
that the Messenger of Allah (ﷺ) said: "Verbally abusing a Muslim is disobedience and fighting him is disbelief." (IT)
Reference (IT): Jami` at-Tirmidhi 2635 (IT)
In-book reference (IT): Book 40, Hadith 30 (IT)
English translation (IT): Vol. 5, Book 38, Hadith 2635 (IT)