Hisham ibn Hakam

Abā Muḥammad Hishām ibn al-Ḥakam al-Kūfī al-Kindī commonly known as Hisham ibn al-Hakam, was a Shia Muslim scholar, theologian (mutakallim) and a companion of Imams Jafar al-Sadiq (732–765) and Musa al-Kadhim (765–799). He was famous for his debates regarding Imamate, free will (jabr) and the existence of God. His hadith is considered trustworthy by all Shia scholars. He authored numerous works and treatises on various subjects, including Imamate, refutation of the Mu'tazilites and Qadariyah (determinists) and on Aristotle. His work regarding Imamah apparently formed the base of Firaq al-Shi'a, one of the primary sources on Shiite sects until the 9th century, by Abu Muhammad al-Hasan ibn Musa al-Nawbakhti.