Imam Muḥammad al-Baqir, full name Muhammad bin 'Ali bin al-Husayn bin Ali bin Abi Talib, also known as Abu Ja'far or simply al-Baqir (Arabic: محمد الباقر‎, translit. al-Bāqir, lit. 'the one who opens knowledge') (677-733) was the fifth Shia imam, succeeding his father Imam Zayn al-Abidin and succeeded by his son Imam Ja'far al-Sadiq. He was the first imam descended from both grandsons of Prophet Muhammad: Hasan ibn Ali and Husayn ibn Ali. He is revered by Shiite Muslims for his religious leadership, and respected by Sunni Muslims for his knowledge and Islamic scholarship as a jurist in Medina.