It has been narrated on the authority of Sa'id b. Musayyab who said:
My father was one of those who swore fealty to the Messenger of Allah ( صلی اللہ علیہ وسلم ) near the tree. When we passed that way next year intending to perform the Hajj, the place of the tree was hidden to us. If you could point out clearly, you would (certainly) be knowing better.