Hadith 17:434
25736. Umar ibn Sa'd narrated to us, from Sufyan, from al-Dahhak ibn Uthman, from Nafi', from Ibn Umar, who said: A man passed by the Prophet, may Allah bless him and grant him peace, while he was urinating, and he greeted him, but he did not return the greeting to him.
حدثنا عمر بن سعد عن سفيان عن الضحاك بن عثمان عن نافع عن بن عمر قال مر رجل على النبي صلى الله عليه وسلم وهو يبول فسلم عليه فلم يرد عليه