Musnad Ahmad 1153:217

Yahya narrated to us, from Shu'bah, who said: Al-Hakam narrated to us, from Ibrahim, from Al-Aswad, who said: I said to Aisha: "What did the Messenger of Allah, may Allah bless him and grant him peace, do among his family?" She said: "He was in the service of his family, and when the prayer time arrived, he would go out to the prayer."