History of the Peloponnesian War

Let us not therefore betray ourselves, but in contemplation of what you were near suffering and how you once prized above all things else to have them in your power, requite them now accordingly. Be not softened at the sight of their present estate, nor forget the danger that hung over our own heads so lately. Give not only unto these their deserved punishment but also unto the rest of our confederates a clear example that death is their sentence whensoever they shall rebel. Which when they know, you shall the less often have occasion to neglect your enemies and fight against your own confederates.