Musnad Ahmad 32:1286

Wahb narrated to us, my father narrated to us, he said: I heard Humayd ibn Hilal narrating from Anas ibn Malik that he said: "It is as if I am looking at the dust of the procession of Gabriel, peace be upon him, rising in the alley of Banu Ghanm when he marched to Banu Qurayza."