Answer:
Pilgrimage to Mecca
Step-by-step explanation:
For Muslims , Mecca is considered as the first house of Worship of Allah which built by prophet Abraham and Ishmael (his son). Typically, Muslims who managed to complete this pilgrimage will be celebrated by the time they get back to their community. It's a very important achievement for every Muslims in the world.
On average, more than 2 million Muslims from all over the world come to Saudi Arabia to complete this Pilgrimage.