It has been narrated on the authority of Abu Huraira that the Messenger Allah (ﷺ) said
A disbeliever and a believer who killed him will never be gathered together in Hell.
It has been narrated on the authority of Abu Huraira that the Messenger of Allah (ﷺ) said
No two such persons shall be together in Hell as if one of them is such that his presence hurts the other. It was asked: Messenger of Allah, who are they? He said: A believer who killed a disbeliever and (then) kept to the right path."