Imam Sadiq is the sixt Shia Imam and a major figure in the Hanafi and Maliki schools of Sunni jurisprudence. He is a significant figure in the formulation of Shia doctrine. The traditions recorded from al-Sadiq are said to be more numerous than all hadiths recorded from all other Shia imams combined. As the founder of "Ja'fari jurisprudence", al-Sadiq also elaborated the doctrine of Nass (divinely inspired designation of each imam by the previous imam), and Ismah (the infallibility of the imams), as well as that of Taqiyyah.