Musannaf Ibn Abi Shayba 1:1858

Zayd ibn al-Hubab narrated to us, from Mu'awiyah ibn Salih, he said: Hamzah narrated to us, from Jarir ibn 'Abd Allah, he said: I came to the Messenger of Allah, may Allah bless him and grant him peace, after the revelation of Surah al-Ma'idah, and I saw him wiping over the khuffayn (leather socks).