Deuteronomy 31:22

“Now therefore write this song for yourselves, and teach it to the children of Israel. Put it in their mouths, that this song may be a witness for me against the children of Israel.

For when I have brought them into the land which I swore to their fathers, flowing with milk and honey, and they have eaten and filled themselves, and grown fat, then they will turn to other gods, and serve them, and despise me, and break my covenant.

It will happen, when many evils and troubles have come on them, that this song will testify before them as a witness; for it will not be forgotten out of the mouths of their descendants; for I know their ways and what they are doing today, before I have brought them into the land which I promised them.”

He commissioned Joshua the son of Nun, and said, “Be strong and courageous; for you shall bring the children of Israel into the land which I swore to them. I will be with you.”

When Moses had finished writing the words of this law in a book, until they were finished,

Moses commanded the Levites, who bore the ark of the LORD’s covenant, saying,