Passage 9.34.8
ὕστερον δὲ ἀναστρέψαντος ἐκ Κόλχων οἱ μὲν αὐτοῦ Φρίξου φασίν, οἱ δὲ Πρέσβωνος---γεγονέναι δὲ Φρίξῳ τὸν Πρέσβωνα ἐκ τῆς Αἰήτου θυγατρός--- οὕτω συγχωροῦσιν οἱ Θερσάνδρου παῖδες οἶκον μὲν τὸν Ἀθάμαντος Ἀθάμαντι καὶ τοῖς ἀπὸ ἐκείνου προσήκειν· αὐτοὶ δὲ---μοῖραν γὰρ δίδωσί σφισιν Ἀθάμας τῆς γῆς---Ἁλιάρτου καὶ Κορωνείας ἐγένοντο οἰκισταί.
Later, after he returned from Colchis, some say it was Phrixus himself, others say it was Presbon—who was born to Phrixus from the daughter of Aeëtes—who came to this agreement with the sons of Thersandros: the house of Athamas should belong to Athamas and his descendants henceforth. But they themselves—for Athamas granted them a portion of land—became the founders of Haliartos and Koroneia.