Musnad Abu Ya'la al-Mawsili 149:124

Ibrahim narrated to us, Hammad narrated to us, from Hisham ibn Urwah, from his father, from Aisha, who said: The Messenger of Allah (peace and blessings of Allah be upon him) used to pray the Asr prayer while the sun was still rising [i.e., high/bright] in my chamber.