Yeshua and His disciples were walking through the grain fields on the Sabbath and they were hungry. They plucked heads of grain and ate them. It is perfectly lawful to do so (Deut. 23:24-25). We are told in Luke’s account that they were rubbing them with their hands in order to remove the chaff from the grain (Luke 6:1). The Pharisees apparently interpreted this to be the equivalent of threshing and winnowing the grain, which is ridiculous.