Muhammad was the founder of Islam. According to Islamic doctrine, he was a prophet and God's messenger, sent to present and confirm the monotheistic teachings preached previously by Adam, Abraham, Moses, Jesus, and other prophets.
Born in approximately 570 CE in the Arabian city of Mecca, Muhammad was orphaned at an early age; he was raised under the care of his paternal uncle Abu Talib and Abu Talib's wife Fatimah bint Asad.
Muhammad gained few early followers, and experienced hostility from Meccan polytheists. To escape ongoing persecution, he sent some followers to Abyssinia in 615, before he and his followers migrated from Mecca to Medina later in 622.
This event, the Hijra, marks the beginning of the Islamic calendar, also known as the Hijri Calendar. In Medina, Muhammad united the tribes under the Constitution of Medina
The revelations, which Muhammad reported receiving until his death, form the verses of the Quran, regarded by Muslims as the verbatim "Word of God" and around which the religion is based.