Mount Arafat is a granite hill about 12 miles east of the holy city of Mecca in Saudi Arabia. It is one important place in the Muslims pilgrimage. The mount Arafat is also know as the "Mount of Marcy" according to Islamic tradition. The hill is the place where the Prophet Muhammad stood and delivered sermon to the Muslims who had accompanied him for the Hajj towards the end of his life. Muslims believe that prayer on this place is their best chance to erase past sins and start a new.

life.https://en.wikipedia.org/wiki/Mount_Arafat

https://www.rferl.org/a/pilgrims-at-hajj-gather-at-mount-arafat/30102926.html

https://religionnews.com/2018/08/20/muslim-pilgrims-gather-at-mount-arafat-for-hajjs-pinnacle/