²⁰ I will bring them into a land that has plenty of milk and honey. I promised the land to their people of long ago. In that land they will eat until they have had enough. They will get fat. When they do, they will turn to other gods and worship them. They will turn their backs on me. They will break my covenant. ²¹ Many horrible troubles and hard times will come on them. Then the song I am giving you will be a witness against them. That is because the song will not be forgotten by their children and their children’s children. I know what they are likely to do. I know it even before I bring them into the land I promised them.” ²² So that day Moses wrote the song down. And Moses taught it to the Israelites.