Deuteronomy 8:3-7

And He humbled you and let you go hungry, and fed you with the manna which you did not know, nor did your fathers know, in order to make you understand that man shall not live on bread alone, but man shall live on everything that comes out of the mouth of the Lord.

Your clothing did not wear out on you, nor did your foot swell these forty years.

So you are to know in your heart that the Lord your God was disciplining you just as a man disciplines his son.

Therefore, you shall keep the commandments of the Lord your God, to walk in His ways and to fear Him.

For the Lord your God is bringing you into a good land, a land of streams of water, of fountains and springs, flowing out in valleys and hills;