Muslim religious figure who many thought was the legitimate caliph. He was a son of ʿAlī, the fourth caliph, but not by his wife, Fāṭimah, who was the daughter of the Prophet Muḥammad. By nature, Muḥammad ibn al-Ḥanafīyah was retiring and inclined to avoid partisan strife; he acted with much caution despite the support of various factions that would have made him caliph. He eventually pledged allegiance to the Umayyad caliph ʿAbd al-Malik, from whom he received a large annual pension.