ἐν πέτροισι πέτρον ἐκτρίβων → by grinding stone against stones
son of Cretheus and Tyro, father of Jason, and king in Iolcus, Od. 11.259.
Αἴσων son of Kretheus, father of Jason “Αἴσονος παῖς” (P. 4.118)