Input: Relationship: 'be king of', Argument/Subject 1: 'cyrus', Argument/Subject 2: 'persian'

Answer: Herodotus recounts the blunt advice of an advisor to Persian king Cyrus , about how to subdue a certain tribe - tell the fathers to become shopkeepers , & the sons to learn the flute & the harp , rather than war - you will make them all effeminate & easy to control .