Sahih Muslim 4895
صحيح مسلم#4895SahihIt 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
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 33:191