Musnad Ahmad 32:141

Sufyan ibn 'Uyaynah narrated to us, Ishaq ibn 'Abdullah ibn Abi Talhah narrated to me, from his uncle Anas, who said: "I and an orphan who was with us in the house—and Sufyan said once: in our house—prayed behind the Messenger of Allah, peace and blessings of Allah be upon him. The Messenger of Allah, peace and blessings of Allah be upon him, came to them in their home, and Umm Sulaym prayed behind us."