Luke 6:5 (KJV)

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.

And certain of the Pharisees said unto them, Why do ye that which is not lawful to do on the sabbath days?

And Jesus answering them said, Have ye not read so much as this, what David did, when himself was an hungred, and they which were with him;

How he went into the house of God, and did take and eat the shewbread, and gave also to them that were with him; which it is not lawful to eat but for the priests alone?

And it came to pass also on another sabbath, that he entered into the synagogue and taught: and there was a man whose right hand was withered.

And the scribes and Pharisees watched him, whether he would heal on the sabbath day; that they might find an accusation against him.

But he knew their thoughts, and said to the man which had the withered hand, Rise up, and stand forth in the midst. And he arose and stood forth.

Then said Jesus unto them, I will ask you one thing; Is it lawful on the sabbath days to do good, or to do evil? to save life, or to destroy it?

And looking round about upon them all, he said unto the man, Stretch forth thy hand. And he did so: and his hand was restored whole as the other.