Passage 8.50.7
παρεσκευασμένων δὲ ἐπὶ τὸν Νάβιν ναυτικὸν τῶν Ῥωμαίων, ὁ Φιλοποίμην ὑπὸ προθυμίας μεθέξειν ἔμελλε τοῦ ἀγῶνος· ἅτε δὲ ἐς ἅπαν ἀπείρως θαλάσσης ἔχων τριήρους ἔλαθεν ἐπιβὰς ῥεούσης, ὥστε καὶ ἐσῆλθε Ῥωμαίους καὶ τὸ ἄλλο συμμαχικὸν μνήμη τῶν ἐπῶν ὧν ἐν καταλόγῳ πεποίηκεν Ὅμηρος ἐπὶ τῇ Ἀρκάδων ἀμαθίᾳ τῇ ἐς θάλασσαν.
When the Roman naval forces had made preparations against Nabis, Philopoemen, eager to take part in the engagement, intended to join them. However, being entirely inexperienced in maritime matters, he boarded a trireme which had already been launched without being noticed, thus causing the Romans and other allies to recall the verses which Homer in his catalogue composed regarding the Arcadians' ignorance of the sea.