Source, in full
VII. 141. Relating the second reply of the Pythian Oracle to the Athenians. B.C. 480. Themistocles interpreted this to mean the ships. See Grote, History of Greece, quoted in Timbs, Curiosities of History. Nepos, Themistocles.
More quotes by Herodotus
This is the bitterest pain among men, to have much knowledge but no power.
I am bound to tell what I am told, but not in every case to believe it.
Attribution
Quote text and notes from Wikiquote: Herodotus (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.