Sahih muslim:150a Chapter: Explaining Al-Iman (Faith), Al-Islam, and Al-Ihsan, and The Obligations of Al-Iman With Affirmation of The Qadar of Allah, Glorious And Most High is He. And Explaining The Evidence For Declaring One’s Innocence Of One Who Does Not Believe In Al-Qadar, And Having A Harsh View Of His Case Book 1, Hadith 285

Sa’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.