Known as al-Baqir.
His full name was Muhammad bin 'Ali bin al-Husayn bin Ali bin Abi Talib and was the fifth Shiite Imam after his father zayn al-Abidin and before his son Ja'far al-Sadiq. He was the first for whom the birth of al-Hasan and al-Husayn, the grandsons of Muhammad came together. Many traditions and abundant knowledge were reported on his authority. He is revered by Shiite Muslims for his religious leadership and highly respected by Sunni Muslims for his knowledge and Islamic scholarship as a leading jurist of Medina