(4) باب إِذَا تَوَاجَهَ الْمُسْلِمَانِ بِسَيْفَيْهِمَا
Ahnaf b. Qais reported on the authority of Abu Bakra that Allah's Messenger (ﷺ) said:
When two Muslims confront each other with their swords, both the slayer and the slain are doomed to Hell-Fire. (IT)
Reference (IT): Sahih Muslim 2888 b (IT)
In-book reference (IT): Book 54, Hadith 19 (IT)
USC-MSA web (English) reference(deprecated numbering scheme): Book 41, Hadith 6899 (IT)