Sahih Muslim 378
صحيح مسلم#378SahihSa'd narrated it on the authority of his father (Abi Waqqas) that he observed:The Messenger of Allah (ﷺ) distributed shares (of booty among his Companions). I said: Messenger of Allah! Give it to so and so, for verily he is a believer. Upon this the Messenger of Allah remarked: Or a Muslim. I (the narrator) repeated it (the word" believer" ) thrice and he (the Holy Prophet) turned his back upon me (and substituted the word)" Muslim," and then observed: I bestow it (this share) to a man out of apprehension lest Allah should throw him prostrate into the fire (of Hell) whereas in fact the other man is dearer to me than he
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: 1:285