Sahih al-Bukhari, 182

Rapporté par Al-Mughira bin Shu`ba : J’étais en voyage avec le Messager d’Allah (ﷺ) et il sortit pour aller aux toilettes. (Après avoir terminé), je lui versai de l’eau et il fit ses ablutions : il se lava le visage, les avant-bras, puis passa sa main mouillée sur sa tête et sur ses deux khuffs (chaussons en tissu épais ou en cuir)

Narrated Al-Mughira bin Shu`ba:I was in the company of Allah's Messenger (ﷺ) on one of the journeys and he went out to answer the call of nature (and after he finished) I poured water and he performed ablution; he washed his face, forearms and passed his wet hand over his head and over the two Khuff (socks made from thick fabric or leather)