Passage 4.9.8
ξυγγενέσθαι τε τῇ παιδὶ καὶ κύειν ἐξ αὐτοῦ. τέλος δὲ ἐς τοσοῦτον Ἀριστόδημον προήγαγεν ὡς ἐκμανέντα ὑπὸ τοῦ θυμοῦ τὴν θυγατέρα ἀποκτεῖναι· μετὰ δὲ ἀνέτεμνε καὶ ἐπεδείκνυεν αὐτὴν οὐκ ἔχουσαν ἐν γαστρί. παρὼν δὲ Ἐπήβολος ἐκέλευεν ἄλλον τινὰ τὸν θυγατέρα ἐπιδώσοντα γενέσθαι· τῆς γὰρ τοῦ Ἀριστοδήμου πλέον εἶναί σφισιν ἀποθανούσης οὐδέν· φονεῦσαι γὰρ τὸν πατέρα αὐτήν, θεοῖς δὲ οἷς ἡ Πυθία προσέταξεν οὐ θῦσαι.
He had intercourse with the girl and she became pregnant by him. In the end, Aristodemus was driven into such fury that, enraged by his anger, he killed his daughter. Afterwards, he cut her open and showed that her womb contained no child. Epibolos, who was present, urged the people to assign another to hand over his daughter, since the death of Aristodemus's daughter had been of no benefit to them. He explained that Aristodemus had murdered his own child, yet had not sacrificed her to the gods as the Pythian oracle had commanded.