Deuteronomy 31:19-22

19“Write down this song, teach it to the Israelites, and have them sing it. This song will be a witness for me against the Israelites.

20I will bring them into the land that I swore to give to their ancestors, a land flowing with milk and honey. When they have eaten all they want and have become fat, they will turn to other gods and worship them. They will despise me and reject my promise.

21When many terrible disasters happen to them, this song will testify against them, because it will never be forgotten by their descendants. I know what their hearts are set on doing, even now before I bring them into the land that I swore to give them.”

22That day Moses wrote down this song and taught it to the Israelites.