Passage 3.26.4
Πέφνου δὲ στάδια εἴκοσιν ἀπέχει Λεῦκτρα. ἐφʼ ὅτῳ μὲν δή ἐστιν ὄνομα τῇ πόλει Λεῦκτρα, οὐκ οἶδα· εἰ δʼ ἄρα ἀπὸ Λευκίππου τοῦ Περιήρους, ὡς οἱ Μεσσήνιοί φασι, τούτου μοι δοκοῦσιν ἕνεκα οἱ ταύτῃ θεῶν μάλιστα Ἀσκληπιὸν τιμᾶν, ἅτε Ἀρσινόης παῖδα εἶναι τῆς Λευκίππου νομίζοντες. λίθου δέ ἐστιν Ἀσκληπιοῦ τε ἄγαλμα καὶ Ἰνοῦς ἑτέρωθι.
Leuctra is twenty stadia distant from Pephnos. For what reason the city was named Leuctra, I do not know. But if it was indeed from Leucippus, the son of Perieres, as the Messenians say, it seems to me this is why the people in this region especially honor Asclepius among the gods, believing him to be the son of Arsinoë, the daughter of Leucippus. Here there is a stone statue of Asclepius and another statue of Ino standing elsewhere.