61 Now it came about that on the Sabbath he was going through the fields of grain, and his disciples took the heads of the grain for food, crushing them in their hands. 2 But some of the Pharisees said, Why do you do what it is not right to do on the Sabbath? 3 And Jesus said, Have you not seen in the Writings what David did when he was in need of food, he, and those who were with him;
Matthew Henry's Commentary on Luke 6:1-3
Commentary on Luke 6:1-5
(Read Luke 6:1-5)
Christ justifies his disciples in a work of necessity for themselves on the sabbath day, and that was plucking the ears of corn when they were hungry. But we must take heed that we mistake not this liberty for leave to commit sin. Christ will have us to know and remember that it is his day, therefore to be spent in his service, and to his honour.