Sayyiduna Sa’d bin Abi Waqqas (may Allah be pleased with him) narrates regarding the Messenger of Allah (peace and blessings of Allah be upon him) that he (peace be upon him) wiped over the leather socks (khuffs).
Hadith Referenceصحيح ابن خزيمه / جماع أبواب المسح على الخفين / 182