3 Jesus said to them, "Haven't you read in the Scriptures what David did when he and his companions were hungry? 4 He went into the house of God, and he and his companions broke the law by eating the sacred loaves of bread that only the priests are allowed to eat.
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.