The Idra, which means threshing floor in Aramaic, is a Kabbalistic work included in printings of the Zohar, and was probably written and appended to the main body of the Zohar at a later date. Contemporary scholars believe the Idra dates to the third generation of Zoharic literature, which produced also the Tikunei haZohar, the Ra'aya Meheimna, and other Zoharic material. The main body of the Zohar, or guf ha-zohar, dates to the second generation of Zoharic material.
