The term 'Mecca Pilgrimage' refers to the religious journey of Muslims to the holy city of Mecca in Saudi Arabia. The pilgrimage is known as the Hadj (4 letters), Hajj (4 letters) or Haj (3 letters) in Arabic. It is a mandatory religious duty for all able-bodied Muslims who can afford it. During the pilgrimage, Muslims perform a series of rituals and prayers in order to gain spiritual rewards.