Passage 4.27.4
μάλιστα δὲ τὸν Ἐπαμινώνδαν ἐς τὸν οἰκισμὸν οἱ Βάκιδος ἐνῆγον χρησμοί. Βάκιδι γὰρ μανέντι ἐκ Νυμφῶν ἐς ἄλλους τέ ἐστιν Ἑλλήνων καὶ ἐς τὴν Μεσσηνίων κάθοδον προειρημένα καὶ τότε δὴ Σπάρτης μὲν ἀπʼ ἀγλαὸν ἄνθος ὀλεῖται, Μεσσήνη δʼ αὖτις οἰκήσεται ἤματα πάντα. ἐγὼ δὲ καὶ περὶ τῆς Εἴρας, ὅντινα ἁλώσοιτο τρόπον, Βάκιν ἐφώρασα εἰρηκότα· καί οἱ καὶ τόδε ἐστὶ τῶν χρησμῶν, οἵ τʼ ἀπὸ Μεσσήνης πατάγῳ κρουνοῖς τε δαμείσης.
It was above all Bacis's oracles that led Epaminondas towards the founding of the city. For Bacis, inspired by the Nymphs, had uttered predictions concerning other Greek affairs and specifically about the return of the Messenians. It was then also that he declared: "Sparta shall perish, deprived of her splendid flower, Messenia, however, shall again be inhabited forever." I myself have observed that Bacis foretold even the manner in which Eira would be captured. Among his oracles is also this passage: "And they who come from Messenia, subdued by clamor and flowing streams."