Musnad Ahmad 1153:1877

'Abd al-Razzaq narrated to us, Ma'mar narrated to us, from al-Zuhri, from 'Urwah, who said: The Prophet, peace and blessings of Allah be upon him, entered upon 'Aishah while he was happy, and he said: "Have you not heard what the Mudliji said?" He had seen Usamah and Zayd sleeping in a garment or a velvet cloth, and their feet were exposed. He said: "Indeed, these feet, some of them are from others."