The stoning took place in Mina, about five kilometres east of the Grand Mosque in the holy city of Mecca.
Pilgrims had moved to Mina overnight on foot, motorbikes, and buses from Mount Arafat after the Haj reached its zenith with a day of prayer, as well as tears by pilgrims moved by the sanctity of the spot where Prophet Mohammed is believed to have given his final sermon 14 centuries ago.
In conjunction with the stoning, pilgrims offer sacrifices by slaughtering a sheep, whose meat goes to the needy.
Nowadays pilgrims do not carry out this rite themselves, but pay agencies which distribute the meat to Muslims in many countries.
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A total of about 1.5 billion Muslims around the world were celebrating Eid al-Adha with sacrifices of sheep, goats and other animals.
The balance of almost 700,000 came from within the kingdom. These numbers are roughly the same as last year.
The Haj has drawn a cross-section of humanity, everyone from presidents - Sudanese leader Omar al-Bashir was among them - to commoners including a wounded Syrian rebel war veteran, as well as rich and poor pilgrims alike.
The Haj, which officially ends on Tuesday, is the world's largest Muslim gathering.
It is one of the five pillars of Islam that every capable Muslim must perform at least once, the high-point of his or her spiritual life.