Muslim pilgrims gather on Mount Mercy on the plains of Arafat during the annual Haj pilgrimage as the country barred worshippers from abroad for a second year running due to the coronavirus disease (COVID-19) pandemic, outside the holy city of Mecca, Saudi Arabia July 19, 2021. Thousands of face-masked Muslims gathered on Saudi Arabia's Mount Arafat on Monday, praying for an end to the pandemic and faster vaccination as the annual haj pilgrimage reached its climax. REUTERS/Ahmed Yosri

Muslim pilgrims pray on Mount Mercy on the plain of Arafat during the annual Haj pilgrimage as the country barred worshippers from abroad for a second year running due to the coronavirus disease (COVID-19) pandemic, outside the holy city of Mecca, Saudi Arabia July 19, 2021. Only 60,000 Saudi citizens and residents, aged 18 to 65, who have been fully vaccinated or have recovered from the virus and who do not suffer from chronic diseases, were selected for the rite, a once-in-a-lifetime duty for every able-bodied Muslim who can afford it. REUTERS/Ahmed Yosri

Muslim pilgrims gather on Mount Mercy on the plains of Arafat during the annual Haj pilgrimage as the country barred worshippers from abroad for a second year running due to the coronavirus disease (COVID-19) pandemic, outside the holy city of Mecca, Saudi Arabia July 19, 2021. Saudi Arabia, home to Islam's holiest sites in Mecca and Medina, has barred worshippers from abroad for a second year running and restricted entry from within the kingdom to guard against the coronavirus and new variants. REUTERS/Ahmed Yosri

Muslim pilgrims pray on Mount Mercy on the plains of Arafat during the annual Haj pilgrimage as the country barred worshippers from abroad for a second year running due to the coronavirus disease (COVID-19) pandemic, outside the holy city of Mecca, Saudi Arabia July 19, 2021. REUTERS/Ahmed Yosri

Muslim pilgrims gather on Mount Mercy on the plains of Arafat during the annual Haj pilgrimage as the country barred worshippers from abroad for a second year running due to the coronavirus disease (COVID-19) pandemic, outside the holy city of Mecca, Saudi Arabia July 19, 2021. REUTERS/Ahmed Yosri

Muslim pilgrims gather on Mount Mercy on the plains of Arafat during the annual Haj pilgrimage as the country barred worshippers from abroad for a second year running due to the coronavirus disease (COVID-19) pandemic, outside the holy city of Mecca, Saudi Arabia July 19, 2021. REUTERS/Ahmed Yosri