9 Then Jesus went over to their synagogue, 10 where he noticed a man with a deformed hand. The Pharisees asked Jesus, "Does the law permit a person to work by healing on the Sabbath?" (They were hoping he would say yes, so they could bring charges against him.) 11 And he answered, "If you had a sheep that fell into a well on the Sabbath, wouldn't you work to pull it out? Of course you would. 12 And how much more valuable is a person than a sheep! Yes, the law permits a person to do good on the Sabbath." 13 Then he said to the man, "Hold out your hand." So the man held out his hand, and it was restored, just like the other one!
Matthew Henry's Commentary on Matthew 12:9-13
Commentary on Matthew 12:9-13
(Read Matthew 12:9-13)
Christ shows that works of mercy are lawful and proper to be done on the Lord's day. There are more ways of doing well upon sabbath days, than by the duties of worship: attending the sick, relieving the poor, helping those who need speedy relief, teaching the young to care for their souls; these are doing good: and these must be done from love and charity, with humility and self-denial, and shall be accepted, Genesis 4:7. This, like other cures which Christ wrought, had a spiritual meaning. By nature our hands are withered, and we are unable of ourselves to do any thing that is good. Christ only, by the power of his grace, cures us; he heals the withered hand by putting life into the dead soul, works in us both to will and to do: for, with the command, there is a promise of grace given by the word.