But by every word that proceedeth out of the mouth of the Lord - literally, “every outgoing of the mouth of the Lord.” Compare Deuteronomy 29:5-6. The term “word” is inserted by the King James Version after the Septuagint, which is followed by Matthew and Luke (see the marginal references). On the means of subsistence available to the people during the wandering, see Numbers 20:1 note. The lesson was taught, that it is not nature which nourishes man, but God the Creator by and through nature: and generally that God is not tied to the particular channels (“bread only,” i. e. the ordinary means of earthly sustenance) through which He is usually pleased to work.
Related Commentaries of Deuteronomy 8:3
Deuteronomy 8:3
3 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.