Musnad Ahmad 32:1565

Hassan narrated to us, Hammad ibn Salamah narrated to us, from Thabit al-Bunani, from Anas ibn Malik: "That the Messenger of Allah (peace and blessings of Allah be upon him) prayed in the house of Umm Haram, and Umm Sulaym and Umm Haram were behind us." And I do not know it except that he said: "He placed me to his right."