Lysias 20 (For Polystratus) 20-21
εἰ δέ τινες κακόνοι ἐγένοντο εἰς τὰ ὑμέτερα πράγματα ἢ γνώμην μὴ ἐπιτηδείαν εἶπον, οὐχ οἱ ἀπόντες τούτων αἴτιοί εἰσιν, ἐπεὶ καὶ τοὺς παρόντας ὑμεῖς ἀπελύσατε. οὐδὲ γὰρ εἴ τις τῶν ἐνθάδε μὴ τὰ ἄριστα λέγων πείθει ὑμᾶς, οὐχ ὑμεῖς ἐστε αἴτιοι, ἀλλ’ ὁ ἐξαπατῶν ὑμᾶς.
If any men have been ill-disposed towards your government or have proposed an improper motion, it is not the absent ones who are to blame for these things – since you have cleared even the ones who were present. For even if one of these men here persuades you by giving advice which is not the best, it is not you who are to blame, but the man who deceives you.