From Sahih Muslim (Hadith 632):
Urwah al Mughira reported it from his father:He (Mughira) helped the Apostle (ﷺ) in performing the ablution, and he performed it and wiped over his shoes. He (Mughira) said to him (about the washing of the feet after putting them off), but he (the Holy Prophet) said: I put them (feet) in when these were clean
Reference: Muslim 632