Islam is a monotheistic religion based on the text of the Quran, believed by adherents of the faith to be the literal word of God, and on the leadership of the prophet Muhammad. The core profession of this belief is the shahada: "There is no god but God and Muhammad is the prophet of God." Followers of Islam are known as Muslims.
Islam is the third of the Abrahamic faiths, the first two being Judaism and Christianity. Muslims affirm the divine origin of these faiths through the line of prophets from Adam to Jesus, but believe that the Quran is the authoritative, complete and final revelation of God. The core practices of Islam are known as the five pillars of Islam -- faith, prayer, almsgiving, fasting and pilgrimage.