Islam is a religion founded and based on faith in one supreme God, Allah. Every follower of Islam believes in this central doctrine and in Prophet Muhammad being the last messenger of God. The Quran, the holy book of the religion is a compilation of all of God's revelations to the Prophet. God revealed his message to the Prophet Muhammad through the archangel Gabriel, about the onenness of God, how to worship him, and the perfected way of life. Therefore the Quran is considered the unchanged word of God and the constitution and the guide for Muslims in this life. The following sites provide details about the fundamental beliefs, principles and tenets of Islam. 1: Shahadah: declaring there is no god except God, and Muhammad is God's Messenger 2: Salat: ritual prayer five times a day 3: Sawm: fasting and self-control during the blessed month of Ramadan 4: Zakat: giving 2.5% of one’s savings to the poor and needy 5:Hajj: pilgrimage to Mecca at least once in a lifetime[5][6] if he/she is able to do[7] Today "Islam is the first largest religion of the world.It is one of the fastest spreading religion of the world" "The only religion approved by God is Islam (Submission)" 3:19