Passage 9.14.4
τότε δὲ ὁ Ἐπαμινώνδας ὡς τοὺς Θεσπιεῖς καταφεύγοντας ἐς τὸν Κερησσὸν ἐξεῖλε, πρὸς τὰ ἐν Πελοποννήσῳ παραυτίκα ἔσπευδεν ἅτε καὶ τῶν Ἀρκάδων προθύμως μεταπεμπομένων. ἐλθὼν δὲ Ἀργείους μὲν προσελάβετο ἑκουσίους συμμάχους, Μαντινέας δὲ κατὰ κώμας ὑπὸ Ἀγησιπόλιδος διῳκισμένους ἐς τὴν ἀρχαίαν συνήγαγεν αὖθις πόλιν· τὰ δὲ πολίσματα τὰ Ἀρκάδων ὁπόσα εἶχεν ἀσθενῶς καταλῦσαι πείσας τοὺς Ἀρκάδας, πατρίδα ἐν κοινῷ σφισιν ᾤκισεν, ἣ Μεγάλη καὶ ἐς ἡμᾶς ἔτι καλεῖται πόλις.
Then Epaminondas, after removing the Thespians who had fled to Ceresus, immediately turned his attention toward affairs in the Peloponnese, as the Arcadians also were eagerly summoning him. When he arrived, the Argives willingly joined him as allies, and he reunited the Mantineans, who had been dispersed by Agesipolis into separate villages, back into their original city. Likewise, he persuaded the Arcadians to abandon the villages that were weakly held, settling them together into a common homeland, a city that even in our own time continues to be called Megalopolis.