is in the Younger Avestan portion, the term appears in the hapax moghu.tbis, 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