Muslim pilgrims pray at the plain of Arafat during the annual Haj pilgrimage, outside the holy city of Mecca, Saudi Arabia July 19, 2021.

A Muslim pilgrim prays at the plain of Arafat during the annual Haj pilgrimage, outside the holy city of Mecca, Saudi Arabia July 19, 2021. REUTERS

Muslim pilgrims arrive at the plain of Arafat during the annual Haj pilgrimage, outside the holy city of Mecca, Saudi Arabia July 19, 2021.

Muslim pilgrims arrive at the plain of Arafat during the annual Haj pilgrimage, outside the holy city of Mecca, Saudi Arabia July 19, 2021.

A Muslim pilgrim prays at the plain of Arafat during the annual Haj pilgrimage, outside the holy city of Mecca, Saudi Arabia July 19, 2021.

Muslim pilgrims pray at the plain of Arafat during the annual Haj pilgrimage, outside the holy city of Mecca, Saudi Arabia July 19, 2021.

Muslim pilgrims pray at the plain of Arafat during the annual Haj pilgrimage, outside the holy city of Mecca, Saudi Arabia July 19, 2021.

Muslim pilgrims arrive at the plain of Arafat during the annual Haj pilgrimage, outside the holy city of Mecca, Saudi Arabia July 19, 2021.

The Mount of Mercy is pictured as a member of Saudi security forces stands guard at the plain of Arafat where Muslims gather during the annual Haj pilgrimage, outside the holy city of Mecca, Saudi Arabia July 19, 2021.

Muslim pilgrims are reflected in the sunglasses of a woman at the plain of Arafat during the annual Haj pilgrimage, outside the holy city of Mecca, Saudi Arabia July 19, 2021.

A Muslim pilgrim prays at the plain of Arafat during the annual Haj pilgrimage, outside the holy city of Mecca, Saudi Arabia July 19, 2021.

A Muslim pilgrim prays at the plain of Arafat during the annual Haj pilgrimage, outside the holy city of Mecca, Saudi Arabia July 19, 2021.

A Muslim pilgrim uses his mobile phone at the plain of Arafat during the annual Haj pilgrimage, outside the holy city of Mecca, Saudi Arabia July 19, 2021.

Muslim pilgrims gather at the plain of Arafat during the annual Haj pilgrimage, outside the holy city of Mecca, Saudi Arabia July 19, 2021.

Muslim pilgrims pray at the plain of Arafat during the annual Haj pilgrimage, outside the holy city of Mecca, Saudi Arabia July 19, 2021.

Muslim pilgrims use their mobile phones as they arrive at the plain of Arafat during the annual Haj pilgrimage, outside the holy city of Mecca, Saudi Arabia July 19, 2021.

A Muslim pilgrim prays at the plain of Arafat during the annual Haj pilgrimage, outside the holy city of Mecca, Saudi Arabia July 19, 2021.

A Muslim pilgrim prays at the plain of Arafat during the annual Haj pilgrimage, outside the holy city of Mecca, Saudi Arabia July 19, 2021.

A Muslim pilgrim prays at the plain of Arafat during the annual Haj pilgrimage, outside the holy city of Mecca, Saudi Arabia July 19, 2021.

A Muslim pilgrim prays at the plain of Arafat during the annual Haj pilgrimage, outside the holy city of Mecca, Saudi Arabia July 19, 2021.