Plato, Laws 931b

τίνα δὴ τὴν ὀρθότητα εἶναι φράζεις; ἐγὼ ἐρῶ· καὶ γὰρ οὖν ἄξιον, ὦ φίλοι, ἀκούειν τά γε δὴ τοιαῦτα. λέγε μόνον. Οἰδίπους, φαμέν, ἀτιμασθεὶς ἐπηύξατο τοῖς αὑτοῦ τέκνοις ἃ δὴ καὶ πᾶς ὑμνεῖ τέλεα καὶ ἐπήκοα γενέσθαι παρὰ θεῶν, Ἀμύντορά τε Φοίνικι τῷ ἑαυτοῦ ἐπαρᾶσθαι παιδὶ θυμωθέντα καὶ Ἱππολύτῳ Θησέα καὶ ἑτέρους ἄλλοις μυρίους

And what do you say is the right way? I will tell you: for in truth, my friends, matters of this sort deserve a hearing. Say on. Oedipus, when he was dishonored (so our story runs), invoked upon his children curses which, as all men allege, were granted by Heaven and fulfilled; and we tell how Amyntor in his wrath cursed his son Phoenix, and Theseus cursed Hippolytus, and countless other parents cursed countless other sons, which curses of parents upon sons it is clearly proved that the gods grant;