Deuteronomy 8:1-2, 16

Carefully obey every command I give you today. Then you will live and grow in number, and you will enter and take the land the LORD promised your ancestors. Remember how the LORD your God has led you in the desert for these forty years, taking away your pride and testing you, because he wanted to know what was in your heart. He wanted to know if you would obey his commands.

and manna to eat in the desert. Manna was something your ancestors had never seen. He did this to take away your pride and to test you, so things would go well for you in the end.