Herodotus (-484–-425 BC) ancient Greek historian, often considered as the first historian
This statement is not to be found in the works of Herodotus. It appears in the acknowledgements to Mark Twain's A Horse's Tale (1907) preceded by the words "Herodotus says", but Twain was simply summarizing what he took to be Herodotus' attitude to historiography.
Misattributed