John Lightfoot on Matthew 12:3

[David, and those that were with him.] For those words of Ahimelech are to be understood comparatively, "Wherefore art thou alone, and no man with thee?" (1 Sam 21:1) that is, comparatively to that noble train wherewith thou wast wont to go attended, and which becomes the captain-general of Israel. David came to Nob, not as one that fled, but as one that came to inquire at the oracle concerning the event of war, unto which he pretended to come by the king's command. Dissembling, therefore, that he hastened to the war, or to expedite some warlike design, he dissembles likewise that he sent his army to a certain place; and that he had turned aside thither to worship God, and to inquire of the vent; that he had brought but a very few of his most trusty servants along with him, for whom, being an hungered, he asketh a few loaves.

[When he was an hungered.] Here hearken to Kimchi, producing the opinion of the ancients concerning this story in these words: "Our Rabbins, of blessed memory, say, that he gave him the show-bread, &c. The interpretation also of the clause, yea, though it were sanctified this day in the vessel [v 6] is this; It is a small thing to say, that it is lawful for us to eat these loaves taken from before the Lord when we are hungry; for it would be lawful to eat this very loaf which is now set on, which is also sanctified in the vessel (for the table sanctifieth); it would be lawful to eat even this, when another loaf is not present with you to give us, and we are so hunger-bitten." And a little after; "There is nothing which may hinder taking care of life, beside idolatry, adultery, and murder."

These words do excellently agree with the force of our Saviour's arguments; but with the genuine sense of that clause, methinks they do not well agree. I should, under correction, render it otherwise, only prefacing this beforehand, that it is no improbable conjecture that David came to Nob either on the sabbath itself, or when the sabbath was but newly gone. "For the show-bread was not to be eaten unless for one day and one night; that is, on the sabbath and the going-out of the sabbath; David, therefore, came thither in the going-out of the sabbath." And now I render David's words thus; "Women have been kept from us these three days," [so that there is no uncleanness with us from the touch of a menstruous woman], "and the vessels of the young men were holy, even in the common way," [that is, while we travelled in the common manner and journey]; "therefore, much more are they holy as to their vessels this [sabbath] day." And to this sense perhaps does that come: "But there was there one of the servants of Saul detained that day before the Lord," [v 8]. The reverence of the sabbath had brought him to worship, and as yet had detained him there.