But he answered and said, it is written,.... The passage referred to, and cited, is in De 8:3 the manner of citing it is what was common and usual with the Jews; and is often to be met with in the Talmudic writings; who, when they produce any passage of scripture, say bytkd, "as it is written".
The meaning of this scripture is; not that as the body lives by bread, so the soul lives by the word of God, and doctrines of the Gospel; though this is a certain truth: or that man lives by obedience to the commands of God, as was promised to the Israelites in the wilderness, and in the land of Canaan; but that God, in satisfying man's hunger, and in supporting and preserving his life, is not tied to bread only, but can make use of other means, and order whatever he pleases to answer these ends; as, by raining manna from heaven, which is mentioned in the passage cited; and therefore there was no occasion to change the nature of things, to turn stones into bread; since that was not so absolutely necessary to the sustenance of life, as that it could not be maintained without it.
Our Lord hereby expresses his strong faith and confidence in God, that he was able to support him, and would do it, though in a wilderness, and destitute of supply; whereby he overcame this temptation of Satan.