Plato, Laws 937c

τις ἁλῷ δὶς ψευδομαρτυρῶν, τοῦτον μηκέτι νόμος ἀναγκαζέτω μηδεὶς μαρτυρεῖν, ἐὰν δὲ τρίς, μηκέτʼ ἐξέστω τούτῳ μαρτυρεῖν· ἐὰν δὲ τολμήσῃ μαρτυρῆσαι τρὶς ἑαλωκώς, ἐνδεικνύτω μὲν πρὸς τὴν ἀρχὴν ὁ βουλόμενος αὐτόν, ἡ δʼ ἀρχὴ δικαστηρίῳ παραδότω, ἐὰν δὲ ὄφλῃ, θανάτῳ ζημιούσθω. ὁπόσων δʼ ἂν μαρτυρίαι ἁλῶσιν δίκῃ, ψευδῆ δοξάντων μαρτυρεῖν καὶ τὴν νίκην τῷ ἑλόντι πεποιηκέναι, ἐὰν τῶν τοιούτων ὑπὲρ

If any person be twice convicted of false witness, no law shall compel him any longer to bear witness, and if thrice, he shall not be allowed to bear witness any longer; and if after three convictions, a man dare to bear witness, whoso wishes shall report him to the magistrates, and they shall hand him over to the court, and if he be found guilty, he shall be punished with death. In the case of all those whose evidence is condemned at the trial,—they being adjudged to have given false witness and thus to have caused the victory of the winner,—if more than the half of their evidence be condemned,