Deuteronomy 8:2-4

New Catholic Bible

² Remember how the Lord, your God, guided your path through the wilderness for these forty years, abasing you and testing you so that he might know what was in your heart, whether or not you would observe his commandments. ³ He brought you low, allowing you to suffer from hunger. He then fed you with manna, something with which your fathers were not familiar, so that you might come to know that man does not live by bread alone,^[a] but man lives by every word that comes forth from the mouth of the Lord.

⁴ Throughout these forty years your clothing did not wear out nor did your feet swell.