It's mentioned in the first sentence of https://el.wikipedia.org/wiki/%CE%A0%CE%AC%CF%81%CE%B9%CF%82 https://el.wikipedia.org/wiki/%CE%A0%CE%AC%CF%81%CE%B9%CF%8

It's mentioned in the first sentence of https://el.wikipedia.org/wiki/%CE%A0%CE%AC%CF%81%CE%B9%CF%82 https://el.wikipedia.org/wiki/%CE%A0%CE%AC%CF%81%CE%B9%CF%82, the first sentence in the corresponding English article, and early in the corresponding pages in other languages that I checked. I chased a few references and found the following: The Iliad: https://www.perseus.tufts.edu/hopper/text?doc=Hom.+Il.+3.16&fromdoc=Perseus%3Atext%3A1999.01.0133 https://www.perseus.tufts.edu/hopper/text?doc=Hom.+Il.+3.16&... Hyginus, in Latin: https://www.hs-augsburg.de/~harsch/Chronologia/Lspost02/Hyginus/hyg_fabu.html#c91 https://www.hs-augsburg.de/~harsch/Chronologia/Lspost02/Hygi... I assume there's more.