Prophet Muhammad

Algerian Muslim pilgrims take pictures on a rocky hill called the Mountain of Mercy, on the Plain of Arafat near the holy city of Mecca, Saudi Arabia, Monday, Oct. 14, 2013. The hajj, a central pillar of Islam and one that able-bodied Muslims must make once in their lives, is a four-day spiritual cleansing based on centuries of interpretation of the traditions of Prophet Muhammad. (AP Photo/Amr Nabil)

Amr Nabil/AP

Algerian Muslim pilgrims in Mecca for the hajj take pictures on the Mountain of Mercy, near the Saudi Arabian holy city. The hajj, a central pillar of Islam and one that able-bodied Muslims must make once in their lives, is a four-day spiritual cleansing based on centuries of interpretation of the traditions of Prophet Muhammad. Read more