Classical Mandaic is the sacred language of the Mandaeans, the last surviving Gnostic religion of antiquity, whose communities lived for centuries along the rivers of southern Iraq and southwestern Iran. It is an Eastern Aramaic dialect, kin to the Aramaic of the Babylonian Talmud, written in a distinctive script whose letters carry ritual meaning and which, unusually among Semitic scripts, writes vowels with full letters.
The classical corpus centres on the Ginza Rabba, the Great Treasure, divided into a Right Ginza of theology and cosmology and a Left Ginza of hymns for the ascent of the soul, together with the Book of John, ritual scrolls, and a rich literature of esoteric commentary. The same dialect appears on the incantation bowls of late antique Mesopotamia, inscribed spirals of protective text buried under thresholds, which give Mandaic some of its earliest physical witnesses. Mandaean scribal tradition attaches unusual weight to copying itself. Colophons chain manuscript to manuscript through named priestly copyists across centuries, making the transmission of the books part of the religion, and initiates into the priesthood must master the classical language as the precondition of office.