Deuteronomy 8:3
And he humbled you, and suffered you to hunger, and fed you with manna, which you knew not, neither did your fathers know; that he might make you know that man does not live by bread only, but by every word that proceeds out of the mouth of the LORD does man live.
Torrey's Topical Textbook—AKJV

Matthew 4:4
But he answered and said, It is written, Man shall not live by bread alone, but by every word that proceeds out of the mouth of God.
Torrey's Topical Textbook—AKJV