Jesus replied, “Have you not read what David did when he and his companions were hungry?
Matthew 12:3. Have you not read what David did? Christ employs five arguments to refute their calumny. First, he apologizes for his disciples by pleading the example of David, (1 Samuel 21:6.) While David was fleeing from the rage of Saul, he applied for provisions to the high-priest Ahimelech; and there being no ordinary food at hand, he succeeded in obtaining a part of the holy bread.
The Jewish teachers had corrupted many of the commandments, by interpreting them more loosely than they were intended; a mistake which Christ discovered and rectified (ch. 5) in his sermon on the mount: but concerning the fourth commandment, they had erred in the other extreme, and interpreted it too strictly.
Commenting on Matthew 12:1-13
But he said unto them, have ye not read,.... If they had not read the Scriptures, they were very unfit persons either to be teachers, or censurers of others, and must have been very slothful and negligent; and if they had, they could not but have observed the case of David, which Christ produces in vindication of his disciples: what David did when he was...