On a Sabbath Jesus' disciples, hungry, pluck heads of grain as they pass through the fields, and the Pharisees accuse them of doing what is not lawful on the Sabbath. Jesus recalls how David and his men ate the bread of the Presence, and declares that something greater than the temple is here and that the Son of Man is Lord of the Sabbath. In the synagogue there is a man with a withered hand, and the Pharisees ask whether it is lawful to heal on the Sabbath so that they can accuse him. Jesus answers that anyone would rescue a sheep that fell into a pit, and a man is worth much more; it is lawful to do good on the Sabbath, and he heals the hand. The Pharisees plot to destroy him.
Jesus withdraws, heals many and tells them not to make him known, fulfilling what Isaiah said of the chosen servant, who will not cry out or break a bruised reed, and in whose name the nations will hope. A blind and mute demon-possessed man is brought to him, and Jesus heals him. The crowds wonder whether he might be the Son of David, but the Pharisees say he casts out demons by Beelzebul, the prince of demons. Jesus answers that a kingdom divided against itself will not stand, and that if he casts out demons by the Spirit of God, the kingdom of God has come upon them. Whoever is not with him is against him. Every blasphemy will be forgiven, but not blasphemy against the Holy Spirit.
Some scribes and Pharisees ask for a sign. Jesus answers that no sign will be given except the sign of Jonah: three days and three nights in the belly of the fish, as the Son of Man will be in the heart of the earth. The men of Nineveh and the queen of the South will condemn this generation, for something greater than Jonah and than Solomon is here. When his mother and brothers seek him, Jesus points to his disciples and says that whoever does the will of his Father is his brother and sister and mother.