Musannaf Ibn Abi Shayba 36:461

Yazid ibn Harun narrated to us, he said: Humayd informed us, from Anas ibn Malik, who said: The Messenger of Allah (may Allah bless him and grant him peace) gave from the spoils of Hunayn one hundred camels to al-Aqra’ ibn Habis, and one hundred camels to ‘Uyaynah ibn Hisn. Some people from the Ansar said: "The Messenger of Allah gives our spoils to people whose swords are dripping with our blood, or whose swords are dripping with our blood." This reached the Prophet (may Allah bless him and grant him peace), so he sent for them and they came. He said to them: "Is there anyone among you who is not of you?" They said: "No, except for the son of our sister." He said: "The son of a people's sister is one of them." He then said: "You said such and such. Are you not pleased that the people go away with sheep and camels, while you go away with Muhammad to your homes?" They said: "Yes, O Messenger of Allah." The Messenger of Allah (may Allah bless him and grant him peace) then said: "The people are the outer garment (dithar), and the Ansar are the inner garment (shi’ar). The Ansar are my inner circle and my trusted confidants. And were it not for the Hijrah, I would have been a man from the Ansar."