Al-Sayyid Ibrahim ibn Musa al-Kazim (), known as al-Murtadha (, "the Attainer of God´s pleasure"), died 825 or after 837, was a ninth century Alid leader who led a rebellion against the Abbasid Caliphate in the Yemen in the aftermath of the Fourth Fitna. He later seized control of Mecca in ca. 817, and was subsequently recognized as legal governor of the city by the caliph al-Ma'mun.