Abu Abd al-Rahman bin Abdullah said that he heard Sayyiduna Abd al-Rahman bin Awf (may Allah be pleased with him) asking Sayyiduna Bilal (may Allah be pleased with him): How did the Messenger of Allah (peace and blessings be upon him) wipe over the leather socks? He said: "He (peace and blessings be upon him) would go out to relieve himself, then call for a vessel of water, wash his face and hands, then wipe over his leather socks and over his turban."
Hadith Referenceالمعجم الكبير للطبراني / باب الباء / 1095