Musnad Ahmad 32:1326

Hammad ibn Khalid narrated to us, Sulayman ibn al-Mughirah narrated to us, from Thabit, from Anas, who said: The Messenger of Allah (peace and blessings of Allah be upon him) entered upon us, while I, my mother, and my maternal aunt were present. He said: "Stand up, so that I may lead you in prayer," at a time other than a prayer time. He (the narrator) said: A man from the people said to Thabit: "Where did he place Anas in relation to him?" He said: "On his right side, and the women were behind him."