Deuteronomy 8:3-7

He humbled you, causing you to hunger and then feeding you with manna, which neither you nor your ancestors had known, to teach you that man does not live on bread alone but on every word that comes from the mouth of the LORD. Your clothes did not wear out and your feet did not swell during these forty years. Know then in your heart that as a man disciplines his son, so the LORD your God disciplines you. Observe the commands of the LORD your God, walking in obedience to him and revering him. For the LORD your God is bringing you into a good land—a land with brooks, streams, and deep springs gushing out into the valleys and hills