Passage 10.17.8
ἔστι δὲ νῆσος οὐ πολὺ ἀπέχουσα τῆς Σαρδοῦς, Κύρνος ὑπὸ Ἑλλήνων, ὑπὸ δὲ Λιβύων τῶν ἐνοικούντων καλουμένη Κορσική. ἐκ ταύτης μοῖρα οὐκ ἐλαχίστη στάσει πιεσθεῖσα ἀφίκετο ἐς τὴν Σαρδώ, καὶ ᾤκησαν τῆς χώρας ἀποτεμόμενοι τῆς ἐν τοῖς ὄρεσιν· ὑπὸ μέντοι τῶν ἐν τῇ Σαρδοῖ τῷ ὀνόματι ὀνομάζονται τῷ οἴκοθεν Κορσοί.
There is an island not far from Sardinia, called Cyrnus by the Greeks and Corsica by the Libyan inhabitants. A considerable portion of its people, oppressed by civil strife, migrated to Sardinia and settled there, claiming for themselves a region of the mountainous country. Yet the natives of Sardinia still call these settlers by their original home name—Corsi.