§7.24.1ὡς μὲν ἐμὲ συμβαλλόμενον εὑρίσκειν, μεγαλοφροσύνης εἵνεκεν αὐτὸ Ξέρξης ὀρύσσειν ἐκέλευε, ἐθέλων τε δύναμιν ἀποδείκνυσθαι καὶ μνημόσυνα λιπέσθαι· παρεὸν γὰρ μηδένα πόνον λαβόντας τὸν ἰσθμὸν τὰς νέας διειρύσαι, ὀρύσσειν ἐκέλευε διώρυχα τῇ θαλάσσῃ εὖρος ὡς δύο τριήρεας πλέειν ὁμοῦ ἐλαστρεομένας.
As far as I can find by conjecturing, Xerxes ordered it to be dug out of ostentation, wishing both to display his power and to leave a memorial; for although it was possible to drag the ships across the isthmus with no trouble at all, he ordered them to dig a canal for the sea of such a width that two triremes could sail through together, rowed abreast.
τοῖσι δὲ αὐτοῖσι τούτοισι, τοῖσί περ καὶ τὸ ὄρυγμα, προσετέτακτο καὶ τὸν Στρυμόνα ποταμὸν ζεύξαντας γεφυρῶσαι.
And to these same men, to whom the digging was also assigned, it had been further commanded to bridge the river Strymon by joining it.