Deuteronomy 4:2-6

You shall not add to the word which I am commanding you, nor take away from it, so that you may keep the commandments of the Lord your God which I am commanding you.

Your eyes have seen what the Lord has done in the case of Baal-peor, for all the men who followed Baal-peor, the Lord your God has destroyed them from among you.

But you who clung to the Lord your God are alive today, every one of you.

“See, I have taught you statutes and judgments just as the Lord my God commanded me, that you are to do these things in the land where you are entering to take possession of it.

So keep and do them, for that is your wisdom and your understanding in the sight of the peoples who will hear all these statutes and say, ‘Surely this great nation is a wise and understanding people.’