Deuteronomy 31:3

31:3 As for the Lord your God, he is about to cross over before you; he will destroy these nations before you and dispossess them. As for Joshua, he is about to cross before you just as the Lord has said.

Deuteronomy 31:20

31:20 For after I have brought them to the land I promised to their ancestors – one flowing with milk and honey – and they eat their fill and become fat, then they will turn to other gods and worship them; they will reject me and break my covenant.