The Messenger of Allah ﷺ wiped over his leather socks and his head covering.
أن رسول الله ﷺ مسح على الخفين والخمار.
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Muslim narrated it in the Book of Purification (275) through the route of Amash, from Hakam, from Abdul-Rahman bin Abu Layla, from Kaab bin Ujra, from Bilal... and so he related it. What is meant by "khimar" here is the turban, as in Sunan Abu Dawud (153), "He wipes over his turban and his khuffs." The "khuff" is a well-known type of leather footwear, and he traced its lineage back to Qasr.Some scholars of knowledge have listed this hadith under the musnad of Usama bin Zayd, for he said, "The Messenger of Allah ﷺ and Bilal entered the marketplaces, and he went to relieve himself, then came out." Usama said, "I asked Bilal what he had done, and Bilal said, 'The Prophet ﷺ went to relieve himself, then performed wudu, washing his face and hands, wiping his head, and wiping over the two khuffs, then he prayed.'"Nasai narrated it (120) from the hadith of Ibn Nafi, from Dawud bin Qays, from Zayd bin Aslam, from Ata bin Yasar, from Usama bin Zayd. Ibn Nafi, who is Abdullah bin Nafi bin Abu Nafi al-Sayigh, was described by Hafiz as, "Trustworthy, sahih in his book, but his memory is somewhat weak."The correct view is that this hadith belongs to the musnad of Bilal, since he is the narrator of the hadith, even though Usama had witnessed part of the story. Ibn Khuzayma, after narrating the hadith through the route of Abdullah bin Nafi, said, "Al-Aswaq is a walled garden in Madinah." He also said, "Abu Tahir informed us, Abu Bakr told us, saying, I heard Yunus say, 'There is no report from the Prophet ﷺ that he wiped over the khuffs while residing at home other than this one.'" (94/1).