Mark 2:23-24

Jesus’ disciples did something that the Mosaic Law permitted when they plucked the ears of wheat or barley (Deuteronomy 23:25). However by doing it on a Sabbath day they violated a traditional Pharisaic interpretation of the law. The Pharisees taught that to do what the disciples did constituted reaping, threshing, and winnowing, and that was forbidden work on the Sabbath (Exodus 20:10). [Note: Mishnah Shabbath 7:2.]