Mark 3:1-6 closes the section of Mark 2:1-3:6, a section known as the “controversy stories.” In each of these events in Jesus’ ministry, He faces increasing hostility and opposition from the scribes, Pharisees, and Herodians. This hostility culminates with the plot to destroy Jesus in 3:6.
The last two stories center around the Sabbath and the accusation that Jesus has violated the Fourth Commandment. In the grainfields (2:23-28), Jesus declares that He is the Lord of the Sabbath and therefore has the right to interpret the Sabbath’s implications; in the Capernaum synagogue (3:1-6), Jesus explains and elaborates what it means that “the Sabbath was made for man, not man for the Sabbath.”
Notes can be found here.