Sayyiduna Ka'b bin Ujrah (may Allah be pleased with him) narrates from Sayyiduna Bilal (may Allah be pleased with him); Bilal (may Allah be pleased with him) said: "I saw the Messenger of Allah (peace and blessings be upon him) wiping over the leather socks (khuffs) and the turban."
Hadith Referenceالمعجم الكبير للطبراني / باب الباء / 1056