Plucking corn

Deu 23:24 When thou comest into thy neighbour's vineyard, then thou mayest eat grapes thy fill at thine own pleasure; but thou shalt not put any in thy vessel. 

Deu 23:25 When thou comest into the standing corn of thy neighbour, then thou mayest pluck the ears with thine hand; but thou shalt not move a sickle unto thy neighbour's standing corn.

Luk 6:1 And it came to pass on the second sabbath after the first, that he went through the corn fields; and his disciples plucked the ears of corn, and did eat, rubbing them in their hands.
Luk 6:2 And certain of the Pharisees said unto them, Why do ye that which is not lawful to do on the sabbath days?

They plucked the corn, rubbing them in their hands to remove the chaff from the barley or wheat corn. Being the sabbath they were on their way to a synagogue or the temple which was nearby. They plucked the corn and were keeping the law in Deut. 23:25. The Pharisees were looking for some offense so as to accuse him. The laws were quite strict and the penalty quite severe if they were not kept. Jesus broke no law. He is Lord of the Sabbath. The Bible says he brought grace and truth.

John 1:14 And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth.

We do not like to hear of the hard things of the law, but they will be our judge if we are not under the safety and salvation of Jesus Christ who brought grace and truth. He took our punishment that the law required for our sins: his blood was poured out for our sins. Jesus keep me under your blood. Wash me of all sins and receive me at your coming. You are my atonement for sins.