Deuteronomy 8:3 in the King James Version
And he humbled thee, and suffered thee to hunger, and fed thee with manna, which thou knewest not, neither did thy fathers know; that he might make thee know that man doth not live by bread only, but by every word that proceedeth out of the mouth of the LORD doth man live.
Context
2 You shall remember all the way which the LORD your God has led you these forty years in the wilderness, that he might humble you, to test you, to know what was in your heart, whether you would keep his commandments or not.
3 He humbled you, allowed you to be hungry, and fed you with manna, which you didn’t know, neither did your fathers know, that he might teach you that man does not live by bread only, but man lives by every word that proceeds out of the LORD’s mouth.
4 Your clothing didn’t grow old on you, neither did your foot swell, these forty years.