Matthew 12:3

Verse 3. But he said unto them, etc. To vindicate his disciples, he referred them to a similar case, recorded in the Old Testament, and therefore one with which they ought to have been acquainted. This was the case of David. The law commanded that twelve loaves of bread should be laid on the table in the holy place in the tabernacle, to remain a week, and then to be eaten by the priests only. Their place was supplied then by fresh bread. This was called the shew-bread, Le 24:5-9. David, fleeing before Saul, weary and hungry, had come to Ahimelech the priest; had found only this bread; had asked it of him, and had eaten it, contrary to the letter of the law, 1 Sa 21:1-7.