Deuteronomy 4:1-6 New King James Version (NKJV)
Moses Commands Obedience
4 “Now, O Israel, listen to the statutes and the judgments which I teach you to observe, that you may live, and go in and [a]possess the land which the Lord God of your fathers is giving you. 2 You shall not add to the word which I command you, nor take from it, that you may keep the commandments of the Lord your God which I command you. 3 Your 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. 4 But 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. 6 Therefore 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.’