Deuteronomy 31:16-21

The LORD said to Moses, “Behold, you are about to lie down [in death] with your fathers; and this people will arise and play the prostitute (commit apostasy) with the foreign gods [of the people] of the land, where they go to be among them. They will abandon (turn away from) Me and break My covenant which I have made with them. Then My anger will be kindled and burn against them in that day, and I will abandon (turn away from) them and hide My face from them. They will be devoured, and many evils and troubles will come on them, so that they will say in that day, ‘Is it not because our God is not among us that these evils have come on us?’ But I will certainly hide My face [from them] in that day because of all the evil which they will do, for they will turn to other gods [to worship lifeless idols, to honor handmade relics]. “Now then, write this song for yourselves, and teach it to the sons of Israel; put it in their mouth, so that this song may be a witness for Me against the sons of Israel. For when I bring them into the land which I have sworn to their fathers, a land [of plenty] flowing with milk and honey, and they have eaten and are satisfied and become prosperous, then they will turn to other gods and serve them, and despise and reject Me and break My covenant. Then it shall come about, when many evils and troubles have come on them, that this [sacred] song will confront them as a witness; for it will not be forgotten from the mouth of their descendants. For I know their inclination which is developing even now, before I bring them into the land which I have sworn to give them.”