The Republic by Plato Part 1 Page 38

well you will very soon find out when you answer; for I expect that you will answer well.

Listen, then, he said; I proclaim that justice is nothing else than the interest of the stronger. And now why do you not praise me? But of course you won’t.

Let me first understand you, I replied. Justice, as you say, is the interest of the stronger. What, Thrasymachus, is the meaning of this? You cannot mean to say that because Polydamas, the pancratiast, is stronger than we are, and finds the eating of beef conducive to his bodily strength, that to eat beef is therefore equally for our good who are weaker than he is, and right and just for us?

That’s abominable of you, Socrates; you take the words in the sense which is most damaging to the argument.