History of the Peloponnesian War

He sent to Astyochus the Lacedaemonian admiral, who was still in the neighbourhood of Miletus, with secret instructions that Alcibiades was ruining their cause by bringing Tissaphernes into friendship with the Athenians; expressly mentioning all the other matters also, and pleading that it was pardonable in him to devise evil against a man who was an enemy, even though it were to the detriment of the state.