Millions of Muslim pilgrims participated in the first day of Eid al-Adha, known as the Festival of Sacrifice and the holiest day on the Islamic calendar, during Hajj in Mecca, Saudi Arabia, on August 21.

This timelapse footage here shows tens of thousands of pilgrims passing through the Bridge of Jamarat to “throw stones at the devil,” the Jamara al-Aqaba, part of the Hajj pilgrimage.

As many as two million pilgrims visited Mecca this year. Credit: @ysrb10 via Storyful