On the Mysteries (97)

No sin shall he commit, no defilement shall he suffer who slays such an one or who conspires to slay him. And all the Athenians shall take oath by tribes and by demes over a sacrifice without blemish to slay such an one. And this shall be the oath: If it be in my power, I will slay by word and by deed, by my vote and by my hand, whosoever shall suppress the democracy at Athens, whosoever shall hold any public office after its suppression, and whosoever shall attempt to become tyrant or shall help to instal a tyrant. And if another shall slay such an one, I will deem him to be without sin in the eyes of the gods and powers above, as having slain a public enemy. And I will sell all the goods of the slain and will give over one half to the slayer, and will withhold nothing from him.