Mark 2:23
And it happened that Jesus was walking through the grainfields on the Sabbath day and His disciples began picking off heads of grain [to eat] as they traveled along. [Note: It was an accepted custom for people in that day to be permitted to do this as they walked along the paths bordering a grainfield].
Matthew 12:1-8
About that time Jesus was walking through a grainfield on the Sabbath day. His disciples were hungry so began picking off some heads of grain to eat [the kernels]. [Note: It was an accepted practice for people in that day to be permitted to do this as they walked along paths bordering a grainfield].
Luke 6:1-5
Now it happened on a Sabbath day that Jesus was walking through some grainfields. His disciples picked off some heads of grain, rubbed them in their hands and ate [the kernels]. [Note: It was an accepted practice for people in that day to be permitted to do this as they walked along paths bordering a grainfield].