From Sahih Bukhari (Hadith 206):
Narrated `Urwa bin Al-Mughira:My father said, "Once I was in the company of the Prophet (ﷺ) on a journey and I dashed to take off his Khuffs (socks made from thick fabric or leather). He ordered me to leave them as he had put them after performing ablution. So he passed wet hands over them
Reference: Bukhari 206