Passage 2.23.6
τὰ δὲ ἐς Ἕλενον τὸν Πριάμου δεδήλωκεν ὁ λόγος ἤδη μοι, μετὰ Πύρρου τοῦ Ἀχιλλέως αὐτὸν ἐλθεῖν ἐς Ἤπειρον καὶ ἐπιτροπεῦσαί τε τοὺς Πύρρου παῖδας συνοικοῦντα Ἀνδρομάχῃ καὶ τὴν Κεστρίνην καλουμένην ἀπὸ Κεστρίνου τοῦ Ἑλένου λαβεῖν τὸ ὄνομα. οὐ μὴν οὐδὲ αὐτῶν λέληθεν Ἀργείων τοὺς ἐξηγητὰς ὅτι μὴ πάντα ἐπʼ ἀληθείᾳ λέγεταί σφισι, λέγουσι δὲ ὅμως· οὐ γάρ τι ἕτοιμον μεταπεῖσαι τοὺς πολλοὺς ἐναντία ὧν δοξάζουσιν.
The tradition concerning Helenus, the son of Priam, has already been explained by me: that he went with Pyrrhus, son of Achilles, to Epirus, served as guardian of Pyrrhus' children while living together with Andromache, and that the region called Cestrine derived its name from Helenus's son Cestrinus. Nevertheless, even the Argive guides themselves are aware that not everything they are saying is true; however, they continue to relate it nonetheless, for it is by no means easy to persuade the majority away from the opinions they already hold.