Muhammad ibn Ali al-Baqir was a descendant of the Islamic prophet Muhammad and the fifth of the twelve Shia imams, succeeding his father, Ali al-Sajjad, and succeeded by his son, Ja'far al-Sadiq. Muhammad's honorific title al-Baqir is short for baqir al-ilm, which means 'the one who splits knowledge open', a reference to his fame as a religious scholar.