Musannaf Ibn Abi Shaybah 1883 — Wiping over the leather socks

Yahya bin Ubayd said: Muhammad bin Sa'd used to perform ablution from a large water-skin (rawiyah). One day he came out to us after relieving himself, performed ablution and wiped over his leather socks, and we were very surprised. We said: "What is this?" He said: "My father told us that the Prophet (peace and blessings be upon him) used to do just the same."