Sunan An-Nasa'i

It was narrated from Abu Musa Al-Ash'ari that :The Messenger of Allah [SAW] said: ""If two Muslims confront each other with swords and one of them kills the other, then the killer and the slain will both be in Hell."" A man said: ""O Messenger of Allah, (we understand about) the killer, but what about the one who is killed?"" He said: ""He wanted to kill his companion