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Vendidad (Pahlavi) [from vi-daevo-datem the anti-demonic law] The principal book of the Avesta, consisting of 22 sections or fargards. The major part of the book is concerned with detailed instructions and teachings on how to avoid sin and defilement by moral and physical purification, "each of which teachings is based on Occult laws" (TG 363). The first fargard tells the story of the creation, and the legend of Yima and the Golden Age. Another tells of the formation of our earth and its six companion karshvares or globes.
The Vendidad is the only complete Zoroastrian Nask that has come down to our day. The Pahlavi Rivayats state that after the wholesale destruction of ancient literature brought about by the vandalism of Alexander the Great, the 21 Nasks forming the Avesta were searched for -- but only the 19th was found, the Vendidad. "It is a pre-eminently occult treatise, full of symbolism and often of meaning quite the reverse of that which is expressed in its dead-letter text" (ibid.).
The Vedidad Sadah ("pure Vendidad") is the original text alone, without Pahlavi translation.

See more at Wikipedia.org...

Vendidad (Pahlavi) [from vi-daevo-datem the anti-demonic law] The principal book of the Avesta, consisting of 22 sections or fargards. The major part of the book is concerned with detailed instructions and teachings on how to avoid sin and defilement by moral and physical purification, "each of which teachings is based on Occult laws" (TG 363). The first fargard tells the story of the creation, and the legend of Yima and the Golden Age. Another tells of the formation of our earth and its six companion karshvares or globes.
The Vendidad is the only complete Zoroastrian Nask that has come down to our day. The Pahlavi Rivayats state that after the wholesale destruction of ancient literature brought about by the vandalism of Alexander the Great, the 21 Nasks forming the Avesta were searched for -- but only the 19th was found, the Vendidad. "It is a pre-eminently occult treatise, full of symbolism and often of meaning quite the reverse of that which is expressed in its dead-letter text" (ibid.).
The Vedidad Sadah ("pure Vendidad") is the original text alone, without Pahlavi translation.