Alī ibn Abī Ṭālib (Arabic: علي بن أﺑﻲ طالب; Transliteration: ʿAlī ibn Abī Ṭālib, [ʕaliː ibn ʔæbiː t̪ˤɑːlib]; 13th Rajab, 24 BH–21st Ramaḍān, 40 AH; approximately October 23, 598 or 600 or March 17, 599 – January 27, 661) was the cousin and son-in-law of the Islamic prophet Muhammad, and ruled over the Islamic Caliphate from 656 to 661. Sunni Muslims consider Ali the fourth and final of the Rashidun (rightly guided Caliphs), while Shi'a Muslims regard Ali as the first Imam and consider him and his descendants the rightful successors to Muhammad, all of which are members of the Ahl al-Bayt, the household of Muhammad. This disagreement split the Ummah (Muslim community) into the Sunni and Shi'a branches.
Many sources, especially Shia ones, state that during Muhammad's time, Ali was the only person born in the Kaaba sanctuary in Mecca, the holiest place in Islam. His father was Abu Talib ibn Abd al-Muttalib and his mother was Fatima bint Asad, but he was raised in the household of Muhammad, who himself was raised by Abu Talib, Muhammad's uncle. When Muhammad reported receiving a divine revelation, Ali was the first male to accept his message, dedicating his life to the cause of Islam.
Ali migrated to Medina shortly after Muhammad did. Once there Muhammad told Ali that God had ordered Muhammad to give his daughter, Fatimah, to Ali in marriage. For the ten years that Muhammad led the community in Medina, Ali was extremely active in his service, leading parties of warriors on battles, and carrying messages and orders. Ali took part in the early raids against caravans from Mecca and later in almost all the battles fought by the early Muslim community.