(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." (ES)
Reference (ES): Jami` at-Tirmidhi 2635 (ES)
In-book reference (ES): Book 40, Hadith 30 (ES)
English translation (ES): Vol. 5, Book 38, Hadith 2635 (ES)