3 But He said to them, "Have you not read what David did when he was hungry, he and those who were with him: 4 how he entered the house of God and ate the showbread which was not lawful for him to eat, nor for those who were with him, but only for the priests? 5 Or have you not read in the law that on the Sabbath the priests in the temple profane the Sabbath, and are blameless? 6 Yet I say to you that in this place there is One greater than the temple. 7 But if you had known what this means, 'I desire mercy and not sacrifice,' you would not have condemned the guiltless. 8 For the Son of Man is Lord even 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.