´It was narrated that Abu Bakrah said:` "If two Muslim men bear weapons against each other, then they are both on the brink of Hell. And if one of them kills the other, they will both be in Hell."
Hadith ReferenceSunan an-Nasa'i / The Book Of Fighting (The Prohibition Of Bloodshed) / Hadith: 4122
Hadith Gradingالألبانی:صحيح موقوف | زبیر علی زئی:حسن