Musannaf Ibn Abi Shayba 1:1898

Ibn ‘Ulayyah narrated to us, from al-Jurayri, from Abu al-‘Ala’ ibn al-Shikhkhir, from ‘Iyad ibn Nadlah, who said: We went out with Abu Musa to some of the gardens. He went off for a need, and I went off for my need. I returned while I was intending to take off my leather socks (khuffayn). He said: "Return them (to your feet) and wipe over them until you place them where you sleep."