A leading figure of early Sufism, renowned for asceticism and Qur'anic exegesis (d. 283/896). Born in Tustar (Shushtar) in Iran, he turned to asceticism at a young age and contributed to the formation of Sufism with his teachings on self-discipline, trust in God and gnosis (TDV Encyclopedia of Islam, "Sehl b. Abdullah et-TĂŒsterĂź"). The Tafsir attributed to him is among the earliest examples of the allegorical (ishari) exegesis tradition, and he is the intellectual source of the Salimiyya theological-mystical school. He died in Basra; his tomb was visited by Ibn Battuta (1326, 1347-48) (TDV; Wikipedia, "Sahl al-Tustari"). No pin is given because precise coordinates could not be cross-verified.