MATTHEW 12 At that time Jesus went through the grainfields on the Sabbath. And His disciples were hungry, and began to pluck heads of grain and to eat. 2 And when the Pharisees saw it, they said to Him, “Look, Your disciples are doing what is not lawful to do on the Sabbath!” 3 But He said to them, “Have you not read what David did when he was hungry, he and those who were with him: 4 how he entered the house of God and ate the showbread which was not lawful for him to eat, nor for those who were with him, but only for the priests? 5 Or have you not read in the law that on the Sabbath the priests in the temple profane the Sabbath, and are blameless? 6 Yet I say to you that in this place there is One greater than the temple. 7 But if you had known what this means, ‘I desire mercy and not sacrifice,’ you would not have condemned the guiltless. 8 For the Son of Man is Lord even of the Sabbath.”9 Now when He had departed from there, He went into their synagogue. 10 And behold, there was a man who had a withered hand. And they asked Him, saying, “Is it lawful to heal on the Sabbath?”—that they might accuse Him. 11 Then He said to them, “What man is there among you who has one sheep, and if it falls into a pit on the Sabbath, will not lay hold of it and lift it out? 12 Of how much more value then is a man than a sheep? Therefore it is lawful to do good on the Sabbath.” 13 Then He said to the man, “Stretch out your hand.” And he stretched it out, and it was restored as whole as the other. 14 Then the Pharisees went out and plotted against Him, how they might destroy Him.

St. Jerome:

To put down the chicanery of the Pharisees it is recorded in ancient history that David was fleeing from Saul and came to Nob. Having been received by Ahimelech the priest, he asked him for food. Since Ahimelech had no common bread at hand, he gave David some holy bread, which only priests and Levites could lawfully eat. The priest asked whether the young men had kept themselves from women, and he received the answer “since yesterday and the day before.” He did not hesitate to give the bread, having thought it better, remembering that the prophet says, “I desire mercy and not sacrifice.”7 In view of the danger of hunger, Ahimelech judged it better to help people than to offer sacrifice to God. The slain victim pleasing to God is the salvation of humankind.