Hajj in Islam is the pilgrimage of Muslims to the city of Makkah in a specific season of each year, and it has certain rituals called the rituals of Hajj, which is a one -time duty in life for every adult capable of Muslims. It is the fifth pillar of Islam, because the Prophet Muhammad ﷺ said: "Islam was built on five: a testimony that there is no god but God and that Muhammad is the Messenger of ...