MINA, Saudi Arabia (AP) Masses of pilgrims on Sunday embarked on a symbolic stoning of the devil in Saudi Arabia under the soaring summer heat. The ritual marks the final days of the Hajj, or Islamic pilgrimage, and the start of the Eid al-Adha celebrations for Muslims around the world.

The stoning is among the final rites of the Hajj, which is one of the Five Pillars of Islam. It came a day after more than 1.8 million pilgrims congregated at a sacred hill known as Mount Arafat, outside the holy city of Mecca, which Muslim pilgrims visit to perform the annual five-day rituals of Hajj.

The pilgrims left Mount Arafat on Saturday evening to spend their night in a nearby site known as Muzdalifa, where they collected pebbles to use in the symbolic stoning of pillars representing the devil.

The pillars are in another sacred place in Mecca, called Mina, where Muslims believe Ibrahims faith was tested when God commanded him to sacrifice his only son Ismail. Ibrahim was prepared to submit to the command, but then God stayed his hand, sparing his son. In the Christian and Jewish versions of the story, Abraham is ordered to kill his other son, Isaac.

On Sunday morning, crowds headed on foot to the stoning areas. Some were seen pushing disabled pilgrims on wheelchairs on a multi-lane road leading to the complex housing the large pillars. Most pilgrims were seen sweltering and carrying umbrellas to protect them against the burning summer sun.