The Histories · 4.32

About a Hyperborean people the Scythians report nothing, nor do any of those who dwell in this region, unless it be the Issedonians: but in my opinion neither do these report anything; for if they did the Scythians also would report it, as they do about the one-eyed people. Hesiod however has spoken of Hyperboreans, and so also has Homer in the poem of the "Epigonoi," at least if Homer was really the composer of that Epic.

Herodotus of Halicarnassus · trans. G. C. Macaulay, 1890
Source edition
Passage preview. Read in context for the complete text, notes and references.