In
Yasht 3.8, 11 and 15, the
Airyaman ishya is described as the weapon with which to put the
daeva Taromaiti ("heresy") to flight. Like the
Ahuna vairya (the first of the four great manthras), the
Airyaman ishya is "the most excellent, the most mighty, the most efficacious, the most smiting, the most victorious, the most healing, the greatest" of the manthras. (
Yasht 1.1-1.3, 3.5-3.6 and 11.3) Also like the
Ahuna vairya, the
Airyaman ishya has the power to elicit good thoughts, words and deeds, and so further
Asha and weaken the
Druj. (
Visperad 24.0-2). Since its incantation was considered the most effective form of healing (
Yasht 3.6), the
Airyaman ishya was accorded special status in the religion.
Vendidad 20.12 notes its efficacy against "all sickness and death, all sorcerers and witches, all seducers belonging to the Lie." The
Yasna verse immediately following the prayer considers the
Airyaman ishya "the greatest uttering of
Asha." (
Yasna 54.2) ==In Zoroastrian tradition==