Luke 6:3-5

And Jesus answering them said, Have ye not read even this, what David did, when he was hungry, he, and they that were with him; how he entered into the house of God, and took and ate the showbread, and gave also to them that were with him; which it is not lawful to eat save for the priests alone? And he said unto them, The Son of man is lord of the sabbath.