Passage 5.3.7
ἦσαν δὲ οἱ Ἡρακλεῖδαι συγγενεῖς καὶ ἄλλως τοῖς ἐν Αἰτωλίᾳ βασιλεῦσι, καὶ ἀδελφαὶ Θόαντι τῷ Ἀνδραίμονος καὶ Ὕλλου τοῦ Ἡρακλέους ἦσαν αἱ μητέρες. συνεπεπτώκει δὲ τῷ Ὀξύλῳ φυγάδι ἐξ Αἰτωλίας εἶναι· δισκεύοντα γάρ φασιν ἁμαρτεῖν αὐτὸν καὶ ἐξεργάσασθαι φόνον ἀκούσιον, τὸν δὲ ἀποθανόντα ὑπὸ τοῦ δίσκου τὸν ἀδελφὸν εἶναι τοῦ Ὀξύλου Θέρμιον, οἱ δὲ Ἀλκιδόκον τὸν Σκοπίου.
Indeed, the Heracleidae were otherwise related to the royal family in Aetolia, as their mothers were sisters, the mother of Thoas son of Andraimon and the mother of Hyllus son of Heracles. It happened also that Oxylus was an exile from Aetolia; for they say that, while throwing a discus, he missed his aim and accidentally committed homicide, and that the man who died from the discus was Thermios, Oxylus' brother, though some say it was Alcidocus, son of Scopius.