'Urwa on the authority of 'Aisha · Funerals (Al-Janaa'iz)

Aisha said, "The Prophet (ﷺ) in his fatal illness said, 'Allah cursed the Jews and the Christians because they took the graves of their Prophets as places for praying."' Aisha added, "Had it not been for that, the grave of the Prophet (p.b.u.h) would have been made prominent but I am afraid it might be taken (as a) place for praying.

When the wall fell on them (i.e. graves) during the caliphate of Al-Walid bin `Abdul Malik, the people started repairing it, and a foot appeared to them. The people got scared and thought that it was the foot of the Prophet. No one could be found who could tell them about it till I (`Urwa) said to them, "By Allah, this is not the foot of the Prophet (ﷺ) but it is the foot of `Umar."