Deuteronomy 4:1, 3

Now, Israel, listen to the laws and commands I will teach you. Obey them so that you will live and so that you will go over and take the land the LORD, the God of your ancestors, is giving to you.

You have seen for yourselves what the LORD did at Baal Peor, how the LORD your God destroyed everyone among you who followed Baal in Peor.