What did the narrator of the hadith witness after the Prophet Muhammad (saw) completed prayer and why?
 This badith has been reported on the authority of Yahya b. Abu Kathir with the same chain of transmitters (with a slight variation of these words):                      I saw the Messenger of Allah (may peace be upon him) after he had completed (the prayer) and there was a trace of clay on his forehead and tip (of the nose).