Pherecydes Frgt., 95
Οἰδίποδι Κρέων δίδωσι τὴν βασιληίην καὶ τὴν γυναῖκα Λαίου, μητέρα δ᾿ αὐτοῦ Ἰοκάστην, ἐξ ἧς γίνονται αὐτῶι Φράστωρκαὶ Λαόλυτος, οἳ θνήισκουσιν ὑπὸ Μινυῶν καὶ Ἐργίνου. ἐπεὶ δὲ ἐνιαυτὸς παρῆλθε, γαμεῖ ὁ Οἰδίπους Εὐρυγάνειαν τὴν Περίφαντος, ἐξ ἦς γίνονται αὐτῶι Ἀντιγόνη καὶ Ἱσμήνη, ἣν ἀναιρεῖ Τυδεὺς ἐπὶ κρήνης καὶ ἀπ᾿ αὐτῆς ἡ κρήνη Ἱσμήνη καλεῖται. υἱοὶ δὲ αὐτῶι ἐξ αὐτῆς Ἐτεοκλῆς καὶ Πολυνείκης. ἐπεὶ δὲ Εὐρυγάνεια ἐτελεύτησε, γαμεῖ ὁ Οἰδίπους Ἀστυμέδουσαν τὴν Σθενέλου.


The Scholion on Euripides Phoenissae 53 reports that "Pherecydes records (ἱστορεῖ) the details of Oedipus' children and marriages as follows:
"Creon gives to Oedipus the kingship and wife of Laius, even his own mother Jocasta, from whom are born to him Phrastor and Laolutos. These die at the hands of the Minyes and of Erigonus. After a year has passed, Oedipus marries Eurygeneia the daughter of Periphas, from whom are born to him Antigone and Hismene. Tydeus took Hismene to wife at a spring, and the spring is called Hismene after her. The sons born to him of her are Eteocles and Polyneices. When Eurygeneia died, Oedipus married Astymedousa the daughter of Sthenelus.
[The scholiast concludes:] "Some mythographers say that Eurygeneia is the daughter of Jocasta, Oedipus' mother."

—— trans by RTM