Passage 9.25.9
τὰ γὰρ δὴ δρώμενα ἐν Θήβαις ἐτόλμησαν ἐν Ναυπάκτῳ κατὰ ταὐτὰ ἰδιῶται δρᾶσαι, καὶ σφᾶς οὐ μετὰ πολὺ ἐπέλαβεν ἡ δίκη. ὅσοι δὲ ὁμοῦ Μαρδονίῳ τῆς στρατιᾶς τῆς Ξέρξου περὶ Βοιωτίαν ἐλείφθησαν, τοῖς παρελθοῦσιν αὐτῶν ἐς τὸ ἱερὸν τῶν Καβείρων τάχα μέν που καὶ χρημάτων μεγάλων ἐλπίδι, τὸ πλέον δὲ ἐμοὶ δοκεῖν τῇ ἐς τὸ θεῖον ὀλιγωρίᾳ, τούτοις παραφρονῆσαί τε συνέπεσεν αὐτίκα καὶ ἀπώλοντο ἐς θάλασσάν τε καὶ ἀπὸ τῶν κρημνῶν ἑαυτοὺς ῥίπτοντες.
Indeed, private individuals in Naupactus ventured to perform rites identical to those done in Thebes, and justice soon overtook them. As for the soldiers from Xerxes' army who were left behind with Mardonius around Boeotia, some of these, having entered the sanctuary of the Cabeiri—likely motivated partly by the expectation of great wealth, but mostly, it seems to me, by their disregard for the divine—immediately became insane and perished, throwing themselves into the sea or from cliffs.