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, romanized: al-Bāqir, lit. 'the one who opens knowledge') (677-733) was the fifth Shia Imam, succeeding his father Zayn al-Abidin and succeeded by his son Ja'far al-Sadiq.

Alī ibn Muḥammad ibn ‘Alī (Arabic: علي بن محمد بن علي‎‎; 829-868 C.E.) was the tenth of the Twelve Imams after his father Muhammad al-Jawad and before his son Hasan al-Askari. He remained in Medina teaching until the age of 30 when he was summoned to Samarra by the Abbasid caliph Al-Mutawakkil. There he was treated roughly by the caliph and his successors until, according to Shiite accounts, he was poisoned through intrigue of Al-Mu'tazz the Abbasid caliph, in 254/868, and was buried in Samarra.