Avesta

Also called  Zend-avesta,   sacred book of Zoroastrianism containing its cosmogony, law, and liturgy, the teachings of the prophet Zoroaster (Zarathushtra). The extant Avesta is all that remains of a much larger body of scripture, apparently Zoroaster's transformation of a very ancient tradition. The voluminous manuscripts of the original are said to have been destroyed when Alexander the