Saudi officials say more than 2.5 million Muslim pilgrims are taking part in the annual Hajj rites, which peak on Saturday.
Hajj is the oldest and most sacred ritual of Islam. The pilgrimage focuses on the holy city of Mecca, the birthplace of the Prophet Muhammad.
Watch video of this year's Hajj in Mecca
Saudi Crown Prince Nayef bin Abdel Aziz said a record 1.8 million foreign pilgrims had arrived the kingdom as of Friday. He said they represented 183 nationalities. The foreigners will join hundreds of thousands of Saudi Muslims who are taking part in the ritual.
The Hajj will end on Sunday with Eid al-Adha, or the Festival of Sacrifice.
U.S. President Barack Obama issued a statement Saturday wishing Muslims worldwide a happy Eid and saying their accompanying acts of charity join the international community's relief efforts around the world.
The Hajj is one of the five pillars of Islam, one which every Muslim most fulfill, if possible, during his or her lifetime.
Some information for this report was provided by AP, and AFP.
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