Musannaf Ibn Abi Shayba 3:6127

Abu Bakr narrated to us, he said: Waki' narrated to us, he said: Ibn Abi Dhi'b narrated to us, from Uthman ibn Abdullah ibn Suraqah, from Jabir ibn Abdullah, he said: I saw the Prophet, may Allah bless him and grant him peace, praying upon his riding beast facing the east during the expedition of Anmar.