Passage 3.19.12
ἐς ταύτην πρῶτος ἐσπλεῦσαι λέγεται Κροτωνιάτης Λεώνυμος. πολέμου γὰρ Κροτωνιάταις συνεστηκότος πρὸς τοὺς ἐν Ἰταλίᾳ Λοκρούς, τῶν Λοκρῶν κατὰ οἰκειότητα πρὸς Ὀπουντίους Αἴαντα τὸν Ὀιλέως ἐς τὰς μάχας ἐπικαλουμένων, ὁ Λεώνυμος Κροτωνιάταις στρατηγῶν ἐπῄει τοῖς ἐναντίοις κατὰ τοῦτο ᾗ προτετάχθαι σφίσι τὸν Αἴαντα ἤκουε. τιτρώσκεται δὴ τὸ στέρνον καὶ--- ἔκαμνε γὰρ ὑπὸ τοῦ τραύματος---ἀφίκετο ἐς Δελφούς. ἐλθόντα δὲ ἡ Πυθία Λεώνυμον ἀπέστελλεν ἐς νῆσον τὴν Λευκήν, ἐνταῦθα εἰποῦσα αὐτῷ φανήσεσθαι τὸν Αἴαντα καὶ ἀκέσεσθαι τὸ τραῦμα.
The first who is said to have sailed to this island was Leonymus of Croton. For when war arose between the Crotoniats and the Locrians in Italy, and the Locrians, due to their kinship with the Opuntians, called upon Ajax son of Oileus to support them in battle, Leonymus, who was commanding the Crotoniats, attacked the enemy at precisely the place where he heard Ajax had been arrayed against them. He received a wound in his chest, and, suffering terribly from the injury, travelled to Delphi. Upon his arrival, the Pythian priestess sent Leonymus to the island of Leuke, telling him that there Ajax would appear to him and would heal his wound.