A man greeted the Prophet ﷺ with the salaam while he was urinating, and he did not return the greeting.
حدثنا نصر بن علي ومحمد بن بشار قالا حدثنا أبو أحمد محمد بن عبد الله الزبيري عن سفيان عن الضحاك بن عثمان عن نافع
أن رجلا سلم على النبي ﷺ وهو يبول فلم يرد عليه
Muslim also narrated it in the Book of Menstruation, chapter on tayammum, hadith 370, from the hadith of Sufyan Thawri with the same wording.On this subject there are also narrations from Muhajir bin Qunfudh [Abu Dawud, hadith 17, and Ibn Majah, hadith 350], Abdullah bin Hanzala [Ahmad, 5/225], Alqama bin Fagwa [Tahawi in Sharh Maani al-Athar, 1/45], Jabir [Ibn Majah, hadith 352], and Bara bin Azib [see Majma al-Zawaid, 1/276].