Ḥamza b. Ādharak al-Khārijī (d. 206/821 or 213/828), also known as Ḥamza al-Shārī, was one of the leaders of the Khārijī rebellion in Sīstān and established the Ḥamziyya branch of the Khārijī movement. He united the various Khārijī groups in eastern Iran under a single banner and killed several ʿAbbāsid officials, disrupting the flow of tax from the region to the ʿAbbāsid treasury.

Al-Jāḥiẓ gives Ḥamza’s name as Abū Khuzayma (4/24). Ḥamza was the son of a farmer whose name is recorded in various sources as either Atarak, Ak…