The Republic by Plato Part 1 Page 30

to say this is not wise; for it is not true, if, as has been clearly shown, the injuring of another can be in no case just.

I agree with you, said Polemarchus.

Then you and I are prepared to take up arms against any one who attributes such a saying to Simonides or Bias or Pittacus, or any other wise man or seer?

I am quite ready to do battle at your side, he said.

Shall I tell you whose I believe the saying to be?

Whose?

I believe that Periander or Perdiccas or Xerxes or Ismenias the Theban, or some other rich and mighty man, who had a great opinion of his own power, was the first to say that justice is ‘doing good to your friends and harm to your enemies.