Muhammad in Islam of all pagan idols. In later years in Medina, Muhammad unified the different tribes of Arabia under Islam, carried out social and religious reforms. By the time he died in 632, almost all the tribes of the Arabian Peninsula had converted to Islam. The Quran enumerates little about Muhammad's early life or other biographic details, but it talks about his prophetic mission, his moral excellence, and theological issues regarding Muhammad. According to the Quran, Muhammad is the last in a chain of prophets sent by God (). Throughout the Quran, Muhammad is referred to as "Messenger", "Messenger of God", and
Prophets and messengers in Islam a reference to the future prophet John the Baptist (Yahya). In Muslim belief, every Islamic prophet preached Islam. The beliefs of charity, prayer, pilgrimage, worship of God and fasting are believed to have been taught by every prophet who has ever lived. The Quran itself calls Islam the "religion of Abraham" (Ibrahim) and refers to Jacob (Yaqub) and the Twelve Tribes of Israel as being Muslim. The Quran says Islam teaches that prophets were "protected from sin" by God, so unlike lesser human beings they cannot commit a sin. The Quran speaks of the "Islamic prophets" as being the greatest