Musnad Ahmad 1153:931

Muhammad ibn Ja'far narrated to us, he said: Shu'bah narrated to us, from al-Hakam, from Ibrahim, from al-Aswad, who said: I asked Aisha, "How did the Messenger of Allah, peace and blessings of Allah be upon him, act?" She said: "He would be in the service of his family, and when the prayer arrived, he would go out and pray."