Verse 2. - And certain of the Pharisees said unto them, Why do ye that which is not lawful to do on the sabbath days? It would seem that these Pharisees came from Jerusalem, and were no doubt privately commissioned to watch narrowly the acts of the new Teacher who was beginning to attract such general attention, and who already was openly setting at nought the numberless additions which the Jewish schools had added to the Law. Round the original "sabbath law" of Moses thirty-nine prohibitions had been laid down in the oral law; round these "thirty-nine" a vast number of smaller rules had grouped themselves. Amongst these greater and lesser sabbath restrictions were prohibitions against "reaping and threshing." Now, plucking ears of corn was defined to be a kind of "reaping," and rubbing the ears in the hands a kind of "threshing." "See," cried some of these spying Pharisees, "do thy disciples publicly break the sabbath, and dost thou not rebuke them?" The Lord's reply does not attempt to discuss what was and what was not lawful on the sabbath, but in broad terms he expounds the great doctrine respecting the significance, limits, and purpose of every law relating to outward acts, even in the event of that law having been given by God, which was not the case in the present alleged transgression. How rigidly the stricter Jews some fourteen or fifteen centuries later still kept these strained and exaggerated traditional sabbath-day restrictions, is shown in a curious anecdote of the famous Abarbanel, "when, in 1492, the Jews were expelled from Spain, and were forbidden to enter the city of Fez, lest they should cause a famine, they lived on grass; yet even in this state 'religiously avoided the violation of their sabbath by plucking the grass with their hands. To avoid this they took the much more laborious method of grovelling on their knees, and cropping it with their teeth!"

6:1-5 Christ justifies his disciples in a work of necessity for themselves on the sabbath day, and that was plucking the ears of corn when they were hungry. But we must take heed that we mistake not this liberty for leave to commit sin. Christ will have us to know and remember that it is his day, therefore to be spent in his service, and to his honour.And certain of the Pharisees said unto them,.... Unto the disciples. The Evangelists Matthew and Mark say, that they said this to Jesus: no doubt but they said it to both, first to one, and then to the other; probably last of all to Christ, who returned an answer to it:

why do ye that which is not lawful on the sabbath day? as to pluck ears of corn, and rub them, and eat them; See Gill on Matthew 12:2