Musnad Ahmad 1153:549

Abu al-Mughirah narrated to us, al-Awza'i narrated to us, he said: al-Zuhri and 'Ata' ibn Abi Rabah narrated to me, they said: 'Urwah ibn al-Zubayr narrated to us, that 'Aishah, the wife of the Prophet, may God bless him and grant him peace, said: "The Messenger of God, may God bless him and grant him peace, used to pray at night while I was lying across between him and the Qiblah."