The Republic by Plato Part 1 Page 42

interest; when they are mistaken, contrary to their interest; you admit that?

Yes.

And the laws which they make must be obeyed by their subjects, — and that is what you call justice?

Doubtless.

Then justice, according to your argument, is not only obedience to the interest of the stronger but the reverse?

What is that you are saying? he asked.

I am only repeating what you are saying, I believe. But let us consider: Have we not admitted that the rulers may be mistaken about their own interest in what they command, and also that to obey them is justice? Has not that been admitted?

Yes.