Ja'far al-Sadiq
Ja'far ibn Muhammad al-Sadiq (Arabic: جعفر ابن محمد الصادق, romanized: Jaʿfar ibn Muḥammad al-Ṣādiq; c. 702–765) was a Muslim scholar, jurist, hadith transmitter and the sixth and last agreed-upon Shia Imam amongst Twelvers and Isma'ilis. Known by the title al-Sadiq ("The Truthful"), Ja'far was the eponymous founder of the Ja'fari school of Islamic jurisprudence.