Deuteronomy 31:19-20

Therefore write down this song for yourselves and teach it to the Israelites; have them recite it, so that this song may be a witness for Me against the Israelites. When I bring them into the land I swore to give their fathers, a land flowing with milk and honey, they will eat their fill and prosper. They will turn to other gods and worship them, despising Me and breaking My covenant.