Plato, Laws 938c

ἐὰν δὲ φιλοχρηματίᾳ, τὸν μὲν ξένον ἀπιόντα ἐκ τῆς χώρας μήποτε πάλιν ἐλθεῖν ἢ θανάτῳ ζημιοῦσθαι, τὸν ἀστὸν δὲ τεθνάναι φιλοχρημοσύνης ἕνεκα τῆς ἐκ παντὸς τρόπου παρʼ αὐτῷ τιμωμένης· καὶ ἐάν τις φιλονικίᾳ κριθῇ δὶς τὸ τοιοῦτον δρᾶν, τεθνάτω.

and forbidden to return on pain of death, but if he be a citizen he shall be put to death because of his unscrupulous devotion to the pursuit of gain. And anyone who has twice been pronounced guilty of committing such an act from ambition shall be put to death.