Sunan Ibn Majah 3965
سنن ابن ماجه#3965SahihIt was narrated from Abu Bakrah that the Prophet (ﷺ) said:“When one Muslim wields his weapon against his brother, both of them are at the edge of Hell, and if one of them kills the other, they will both enter it.”
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 36:40