The saying that when the iron bird flies and horses run on wheels, the Dharma will go to the land of the red man.
Documented
The citation hunt
The quote circulates in Western Buddhist centers from the late 20th century, attributed to Padmasambhava. Scholars and practitioners who have searched the Tibetan canon report no source text; the earliest attestations are modern and English-language. Tibetans had words for neither aircraft nor, in this phrasing, the specific red-man framing.
Assessment: Documented: the absence is the finding; the quote's modern circulation is traceable.
Stories
The terma defense
Believers reply: terma treasures are still being discovered, and oral transmission predates print, so absence from the canon proves nothing. The prophecy's fulfillment, jets over the Americas, Dharma centers in red-rock country, is offered as evidence.
Assessment: Stories: unfalsifiable by design; the fulfillment is postdiction at its most scenic.
Interesting claims
The prophecy that made itself true
The sociological read: whatever its origin, the saying worked, it licensed Tibetan teachers to come west and western students to receive them as foretold. A prophecy's truth-value may matter less than its visa function; this one stamped a thousand passports.
Assessment: Interesting: the migration of Tibetan Buddhism to America is documented history; the quote greased it regardless of vintage.
Sources and further reading
Circulation traced in Western Buddhist publications from the 1980s onward
Scholarly and practitioner searches of the Kangyur and Tengyur reporting no source text
Judith Snodgrass and others on Buddhism's presentation to the West
Worth asking
What is the oldest verifiable appearance of a prophecy that everyone quotes?