Narrated ‘Urwa bin Al-Mughira (Radi-Allahu ‘anhum):

My father said, “Once I was in the company of the Prophet (Sallallahu ‘Alaihi Wa Sallam) on a journey and I dashed to take off his Khuffs. He ordered me to leave them as he had put them after performing ablution. So he passed wet hands or them.

Bukhari Vol. 1 : No. 205

(Khuff – leather socks)