Magi (; singular magus ; from Latin magus, cf. ) are priests in Zoroastrianism and the earlier religions of the western Iranians. The earliest known use of the word magi is in the trilingual inscription written by Darius the Great, known as the Behistun Inscription. Old Persian texts, predating the Hellenistic period, refer to a magus as a Zurvanic, and presumably Zoroastrian, priest.
Pervasive throughout the Eastern Mediterranean and Western Asia until late antiquity and beyond, mágos (μάγος) was influenced by (and eventually displaced) Greek goēs (γόης), the older word for a practitioner of magic, to include astronomy/astrology, alchemy, and other forms of esoteric knowledge. This association was in turn the product of the Hellenistic fascination for Pseudo-Zoroaster, who was perceived by the Greeks to be the Chaldean founder of the Magi and inventor of both astrology and magic, a meaning that still survives in the modern-day words "magic" and "magician".
In the Gospel of Matthew, "μάγοι" (magoi) from the east do homage to Jesus, a child and the transliterated plural "magi" entered English from Latin in this context around 1200 (this particular use is also commonly rendered in English as "kings" and more often in recent times as "wise men"). The singular "magus" appears considerably later, when it was borrowed from Old French in the late 14th century with the meaning magician.
Hereditary Zoroastrian priesthood has survived in India and Iran. They are termed Herbad, Mobad (Magupat, i.e. chief of the Maga), and Dastur depending on the rank.
Iranian sources
The term only appears twice in Iranian texts from before the 5th century BC, and only one of these can be dated with precision. This one instance occurs in the trilingual Behistun inscription of Darius the Great, and which can be dated to about 520 BC. In this trilingual text, certain rebels have magian as an attribute; in the Old Persian portion as maγu- (generally assumed to be a loan word from Median). The meaning of the term in this context is uncertain.
The other instance appears in the texts of the Avesta, the sacred literature of Zoroastrianism. In this instance, which is in the Younger Avestan portion, the term appears in the hapax moghu.tbiš, meaning "hostile to the moghu", where moghu does not (as was previously thought) mean "magus", but rather "a member of the tribe" or referred to a particular social class in the proto-Iranian language and then continued to do so in Avestan.
An unrelated term, but previously assumed to be related, appears in the older Gathic Avestan language texts. This word, adjectival magavan meaning "possessing maga-", was once the premise that Avestan maga- and Median (i.e. Old Persian) magu- were coeval (and also that both these were cognates of Vedic Sanskrit magha-). While "in the Gathas the word seems to mean both the teaching of Zoroaster and the community that accepted that teaching", and it seems that Avestan maga- is related to Sanskrit magha-, "there is no reason to suppose that the western Iranian form magu (Magus) has exactly the same meaning" as well. But it "may be, however", that Avestan moghu (which is not the same as Avestan maga-) "and Medean magu were the same word in origin, a common Iranian term for 'member of the tribe' having developed among the Medes the special sense of 'member of the (priestly) tribe', hence a priest."cf
Some examples of the use of magi in Persian poetry, are present in the poems of Hafez. There are two frequent terms used by him, first one is Peer-e Moghan (literally "the old man of the magi") and second one is Deyr-e Moghan (literally "the monastery of the magi").
Greco-Roman sources
Classical Greek
The oldest surviving Greek reference to the magi – from Greek μάγος (mágos, plural: magoi) – might be from 6th century BC Heraclitus (apud Clemens Protrepticus 2.22.2), who curses the magi for their "impious" rites and rituals. A description of the rituals that Heraclitus refers to has not survived, and there is nothing to suggest that Heraclitus was referring to foreigners.