Narrated Ibn Umar: A man passed by the Prophet صلی اللہ علیہ وسلم while he was urinating, and saluted him. The Prophet صلی اللہ علیہ وسلم did not return the salutation to him. Abu Dawud said: It is narrated on the authority of Ibn Umar that the Prophet صلی اللہ علیہ وسلم performed tayammum, then he returned the salutation to the man.