Musnad Ahmad 1153:976

'Affan narrated to us, he said: Hammad—meaning Ibn Salamah—narrated to us, from Hisham ibn 'Urwah, from his father, from 'Aishah: "That when the Messenger of Allah, peace and blessings of Allah be upon him, finished from the [Battle of the] Confederates, he entered the bathing place to bathe. Then Gabriel, peace be upon him, came and said: 'Have you laid down your weapons? We have not yet laid down our weapons. March forth to Banu Qurayzah.'" 'Aishah said: "It is as if I am looking at Gabriel, peace be upon him, through the gap in the door, having wrapped his head [in a turban] because of the dust."