Deuteronomy 8

Moses exhorts the Israelites to remember the forty years in the wilderness as a time of necessary testing and discipline. God allowed them to hunger and then fed them with manna to teach them that man does not live by bread alone, but by every word that comes from the mouth of the Lord. Moses warns them strictly against becoming proud and forgetting God once they are settled in the prosperity of the Promised Land, reminding them that it is God who gives them the power to get wealth.