What did people think when they saw a foot appear in the grave they were repairing during the caliphate of Al-Walid bin `Abdul Malik and how was it determined that it was not the foot of the Prophet Muhammad (peace be upon him)?
 Narrated `Urwa:                     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 but it is the foot of `Umar."