Sayyiduna al-Mughirah bin Shu'bah (may Allah be pleased with him) said: I saw the Prophet (peace and blessings be upon him) perform ablution (wudu) and wipe over his leather socks, so I said: "O Messenger of Allah! Do you wipe over your leather socks?" He (peace and blessings be upon him) said: "Yes, I put them on in a state of purity."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17992