Answer: Deuteronomy 8:3
More information: Deuteronomy 8:3 (King James Version) reads as "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."