3 But he said to them, Have you no knowledge of what David did when he had need of food, and those who were with him? 4 How he went into the house of God and took for food the holy bread which it was not right for him or for those who were with him to take, but only for the priests?
Matthew Henry's Commentary on Matthew 12:3-4
Commentary on Matthew 12:1-8
(Read Matthew 12:1-8)
Being in the corn-fields, the disciples began to pluck the ears of corn: the law of God allowed it, Deuteronomy 5:14. No law must be understood so as to contradict its own end. And as Christ is the Lord of the sabbath, it is fit the day and the work of it should be dedicated to him.