Plutarch, Lysander
Bernadotte Perrin, Ed.

Of such a sort were his dealings with Miletus, according to the record. For when his friends and allies, whom he had promised to aid in overthrowing the democracy and expelling their opponents, changed their minds and became reconciled to their foes, openly he pretended to be pleased and to join in the reconciliation; but in secret he reviled and abused them, and incited them to fresh attacks upon the multitude. [2] And when he perceived that the uprising was begun, he quickly came up and entered the city, where he angrily rebuked the first conspirators whom he met, and set upon them roughly, as though he were going to punish them, but ordered the rest of the people to be of good cheer and to fear no further evil now that he was with them. [3] But in this he was playing a shifty part, wishing the leading men of the popular party not to fly, but to remain in the city and be slain. And this was what actually happened; for all who put their trust in him were slaughtered.

Furthermore, there is a saying of Lysander's, recorded by Androcleides, which makes him guilty of the greatest recklessness in the matter of oaths. [4] It was his policy, according to this authority, ‘to cheat boys with knuckle-bones, but men with oaths,’ thus imitating Polycrates of Samos; not a proper attitude in a general towards a tyrant, nor yet a Laconian trait to treat the gods as one's enemies are treated, nay, more outrageously still; since he who overreaches his enemy by means of an oath, confesses that he fears that enemy, but despises God.