Jami` at-Tirmidhi 2634

جامع الترمذي#2634Sahih

Narrated Ibn Mas'ud:that the Messenger of Allah (ﷺ) said: "A Muslim's fighting his brother is disbelief, and verbally abusing him is disobedience

Scholarly Authentication

We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:

Ahmad Muhammad ShakirSahih

Al-AlbaniSahih

Bashar Awad MaaroufHasan Sahih

Zubair Ali ZaiSahih

In-book reference: 40:29