(8) باب أَيَرُدُّ السَّلاَمَ وَهُوَ يَبُولُ
Narrated Ibn 'Umar :
A man passed by the Prophet (sal Allaahu alayhi wa sallam ) while he was urinating, and saluted him. The Prophet (sal Allaahu alayhi wa sallam) did not return the salutation to him.Abu Dawud said : It is narrated on the authority of Ibn 'Umar that the Prophet (sal Allaahu alayhi wa sallam) performed tayammum, then he returned the salutation to the man.
Reference: Sunan Abi Dawud 16
In-book reference: Book 1, Hadith 16
English translation: Book 1, Hadith 16