Musnad Ahmad 1153:1394

Muhammad ibn Ja'far narrated to us, Shu'bah narrated to us, and Hajjaj narrated to us, Shu'bah informed us, from Mansur, from Ibrahim, from al-Aswad, from 'Aishah, who said: "I used to be in front of the Messenger of Allah, may Allah bless him and grant him peace, while he was praying. When I wanted to stand up, I disliked passing in front of him, so I would slip away stealthily."