Ibn 'Umar said:The Messenger of Allah (ﷺ) came from the privy. A man met him near Bir Jamal and saluted him. The Messenger of Allah (ﷺ) did not return the salutation until he came to a wall and placed his hands on the wall and wiped his face and hands; he then returned the man's salutation

English translation · Sunan Abu Dawud