Musannaf Ibn Abi Shayba 1:1874

Mu'awiyah ibn Hisham narrated to us, from Shayban, from Yahya ibn Abi Kathir, from Abu Salamah, that Ja'far ibn 'Amr ibn Umayyah informed him that his father informed him that he saw the Prophet, may Allah bless him and grant him peace, wiping over the leather socks.