It was narrated from Mus’ab bin Sa"d that Sa"d bin Malik said:

O Messenger of Allah, I feel joy because Allah enabled me to wreak vengeance on the mushrikeen; grant me this sword. He said: “This sword is not for you and it is not for me; leave it alone." So I put it down, then I came back and said: Perhaps this sword will be given today to someone who did not do as well as me. Then I heard a man calling me from behind and I said: Has something been revealed concerning me? He said: You asked me about the sword, and it was not mine. But now it has been granted to me, and it is yours.” And he said:This verse was revealed (interpretation of the meaning): They ask you (O Muhammad (ﷺ)) about the spoils of war, say: The spoils are for Allah and the Messenger" [al-Anfal 8:1].