Published by: CNBC-TV18.com
As the outbreak of the coronavirus led to worldwide lockdowns in 2020, Saudi authorities limited the Hajj to a few thousand citizens and local residents. The year before, some 2.5 million Muslims had taken part.
The Hajj is one of the five pillars of Islam, and all Muslims are required to undertake it at least once in their lives if they are physically and financially able to do so.
The pilgrimage draws Muslims from around the world to Mecca, in Saudi Arabia, where they walk in the footsteps of the Prophet Muhammad and retrace the journey of Ibrahim and Ismail, or Abraham and Ishmael as they are known in the Christian and Jewish traditions.
Pilgrims have been doing the ritual circuit around the Kaaba since arriving in Mecca over recent days. The rituals during Hajj largely commemorate the Quran's accounts of Ibrahim, his son Ismail and Ismail's mother Hajar.
They will pray throughout the day and night before traveling on Tuesday to Mount Arafat, where the Prophet Muhammad is said to have delivered his final sermon.