al-Hasan al-Basri

Al-Hasan al-Basri (c. 642-728 CE / 21-110 AH) was one of the most influential religious figures of early Islam, a member of the Tabi'un — the generation of Muslims who succeeded the Prophet Muhammad's Companions. Tradition holds that he was born in Medina to Khayra, a freedwoman attached by a bond of clientage (wala') to the Prophet's wife Umm Salama, and to a father of Persian origin named Yasar (also given as Peroz). He grew up in Medina and, by tradition, settled in Basra in southern Iraq, where he spent the rest of his life as a preacher, jurist, Qur'an interpreter and renowned ascetic (zahid).

His sermons on piety, the fear of God and detachment from the world made him a towering moral authority in Basra. Reports describe him serving briefly as a judge (qadi) and clashing with the powerful Umayyad governor al-Hajjaj, whose policies he openly criticised; he is said to have rejected armed rebellion while withholding approval from the regime.

Later movements claimed him as a forerunner: Sufis place him in their spiritual chains, Mu'tazili rationalists cited a letter on free will (qadar) attributed to him — whose authenticity scholars dispute — and Sunni pietists revered him as a model of righteousness. Many anecdotes about him belong to later devotional literature rather than documented history. He died in Basra in 110 AH.