It was narrated from Sa'd bin Abi Waqqas that the Messenger of Allah (ﷺ) wiped over the Khuffs.
Sunan an-Nasa'i Book 1, Hadith 121
← Previous Hadith "The Messenger of Allah (ﷺ) and Bilal entered Al-Aswaf and he went to relieve himself and then came out." Usamah said: "I asked Bilal: 'What did he do?' Bilal said: 'The Prophet (ﷺ) went to relieve himself, then he performed Wudu', so he washed his hands and face, and wiped his head and he wiped over his Khuffs, then prayed.'"

Sunan an-Nasa'i Book 1, Hadith 120 Next Hadith → It was narrated from Sa'd bin Abi Waqqas, from the Messenger of Allah (ﷺ), with regard to wiping over the Khuffs; "There is nothing wrong with it."

Sunan an-Nasa'i Book 1, Hadith 122