Sunan Ibn Majah, Chapter: The Chapters on Jihad

that Jubair bin Mutim told him that he and Uthman bin Affan came to the Messenger of Allah (saw) to speak to him about the way in which the one fifth from Khaibar had been distributed to Banu Hashim and Banu Muttalib. They said: "You have distributed it to our brothers Banu Hashim and Banu Muttalib, but we are related to you (to Banu Hashim) in the same way (as Banu Muttalib)." The Messenger of Allah (saw) said: "Rather I think that Banu Hashim and Banu Muttalib are the same."*