What did the Prophet Muhammad (saw) witness when he visited the Tree of Ar-Ridwan?
 Narrated Sa`id bin Al-Musaiyab:                     That his father said, "I saw the Tree (of the Ar-Ridwan Pledge of allegiance and when I returned to it later, I was not able to recognize it. (The sub--narrator MahmiJd said, Al-Musaiyab said, 'Then; forgot it (i.e., the Tree).)"