Albert Barnes' Notes on the Whole Bible - Deuteronomy 8:3
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:... read more
The Pulpit Commentary - Deuteronomy 8:3
Not bread, but God's Word. The lesson of the manna gathered up into one concise sentence. It teaches us— I. TO SEE GOD IN SECONDARY CAUSES . The Word of God is as truly the creative and nourishing principle in ordinary bread as it was in the extraordinary supply of manna. It is not bread, as something subsisting independently, but bread as the product of Divine power, and as possessing properties which the Word of God imparts to it and upholds in it, which is the staff of... read more