Thucydides 6.38.1-2 (tr. Richard Crawley):
Persons here invent stories that neither are
true nor ever will be. Nor is this the first time that I
see these persons, when they cannot resort to deeds,
trying by such stories and by others even more abominable to frighten your people and get into their hands the
government: it is what I see always.
ἄνδρες οὔτε ὄντα οὔτε ἂν γενόμενα λογοποιοῦσιν, οὓς ἐγὼ
οὐ νῦν πρῶτον, ἀλλ' αἰεὶ ἐπίσταμαι ἤτοι λόγοις γε τοιοῖσδε
καὶ ἔτι τούτων κακουργοτέροις ἢ ἔργοις βουλομένους καταπλήξαντας τὸ ὑμέτερον πλῆθος αὐτοὺς τῆς πόλεως ἄρχειν.