What did the Prophet Muhammad (saw) do in his lifetime that resulted in the building of a wall around the Ka`ba?
 Narrated `Amr bin Dinar and 'Ubaidullah bin Abi Yazid:                     In the lifetime of the Prophet there was no wall around the Ka`ba and the people used to pray around the Ka`ba till `Umar became the Caliph and he built the wall around it. 'Ubaidullah further said, "Its wall was low, so Ibn Az-Zubair built it."