Deuteronomy 4:1-2 New Revised Standard Version (NRSV)
Moses Commands Obedience
4 So now, Israel, give heed to the statutes and ordinances that I am teaching you to observe, so that you may live to enter and occupy the land that the Lord, the God of your ancestors, is giving you. 2 You must neither add anything to what I command you nor take away anything from it, but keep the commandments of the Lord your God with which I am charging you.
Deuteronomy 4:6-9 New Revised Standard Version (NRSV)
6 You must observe them diligently, for this will show your wisdom and discernment to the peoples, who, when they hear all these statutes, will say, “Surely this great nation is a wise and discerning people!” 7 For what other great nation has a god so near to it as the Lord our God is whenever we call to him? 8 And what other great nation has statutes and ordinances as just as this entire law that I am setting before you today?
9 But take care and watch yourselves closely, so as neither to forget the things that your eyes have seen nor to let them slip from your mind all the days of your life; make them known to your children and your children’s children—