555 — Al-Firyābī informed us, saying: Safwān ibn Sālih narrated to us, saying: Muhammad ibn Shuʿayb narrated to us, saying: I heard al-Awzāʿī say, “The first person to profess the Qadari doctrine was a man from Iraq called Sawsan. He was a Christian, then embraced Islam, and afterward returned to Christianity. Maʿbad al-Juhanī learned it from him, and Ghaylān learned it from Maʿbad.”