Passage 7.15.4
ὑποφεύγοντας δὲ Κριτόλαον καὶ Ἀχαιοὺς αἱροῦσιν ὀλίγον πρὸ τῆς Σκαρφείας οἱ ὁμοῦ τῷ Μετέλλῳ, καὶ ἀπέκτεινάν τε πλήθει πολλοὺς καὶ ἔλαβον ζῶντας ὅσον χιλίους. Κριτόλαος δὲ οὔτε ὤφθη ζῶν μετὰ τὴν μάχην οὔτε ἐν τοῖς νεκροῖς εὑρέθη· εἰ δὲ ἐτόλμησε τῆς πρὸς τῇ Οἴτῃ θαλάσσης ἐς ταύτης καταδῦναι τὸ τέλμα, παντάπασιν ἔμελλεν ἄγνωστός τε καὶ ἄπυστος οἰχήσεσθαι κατὰ τοῦ βυθοῦ.
While Critolaus and the Achaeans were fleeing, those accompanying Metellus overtook them a little before the city of Scarphaea, killing a great number, and capturing alive about a thousand men. Critolaus himself was neither seen alive after the battle nor found among the dead. If indeed he ventured into the marsh beside the sea near Mount Oeta, he must have utterly vanished, unknown and unheard of, into its depths.