The word "doeth" may seem unfamiliar, but it is simply an older spelling of "does." In IPA (International Phonetic Alphabet) transcription, "doeth" would be transcribed as /dʌð/, while "does" would be /dʌz/. The addition of the "th" sound harkens back to Middle English pronunciation, which placed more emphasis on dental fricatives (such as "th") than Modern English does. "Doeth as says" is a phrase meaning "do as you are told" and is another example of archaic language usage.