Zend-Avesta is the sacred book of Zoroastrianism. It contains the teachings of the prophet Zoroaster, as well as the cosmogony, law, and liturgy of the religion. The Parsees still use the Zend-Avesta as their bible and prayer book.
The Zend-Avesta is written in the Avestan language, which is also called the Zend language. The Avestan language is an eastern Iranian language.
The Zend-Avesta is all that remains of a much larger body of scripture. It is believed to be Zarathushtra's transformation of a very ancient tradition.
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