I saw the Messenger of Allah ﷺ wiping over his leather slippers (when doing wudoo’). (Using translation from Aḥmad 216)

وَرَأَيْتُ رَسُولَ اللهِ ﷺ يَمْسَحُ عَلَى الْخُفَّيْنِ وَالْخِمَارِ