Deuteronomy 4:3-6

3Your eyes have seen what the Lord did at Baal Peor; for the Lord your God has destroyed from among you all the men who followed Baal of Peor.

4But you who held fast to the Lord your God are alive today, every one of you.

5“Surely I have taught you statutes and judgments, just as the Lord my God commanded me, that you should act according to them in the land which you go to possess.

6Therefore be careful to observe them; for this 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.’