3 But he said to them, Have ye not read what David did when he was hungry, and they that were with him? 4 How he entered into the house of God, and ate the shewbread, which it was not lawful for him to eat, nor for those with him, but for the priests only? 5 Or have ye not read in the law that on the sabbaths the priests in the temple profane the sabbath, and are blameless? 6 But I say unto you, that there is here what is greater than the temple. 7 But if ye had known what is: I will have mercy and not sacrifice, ye would not have condemned the guiltless. 8 For the Son of man is Lord of the sabbath.
Matthew Henry's Commentary on Matthew 12:3-8
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.