How he went into the house of God, and did take and eat the shewbread, and gave also to them that were with him; which it is not lawful to eat but for the priests alone?
These two passages of story we had both in Matthew and Mark, and they were there laid together (Mat 12:1; Mar 2:23; Mar 3:1), because, though happening at some distance of time from each other, both were designed to rectify the mistakes of the scribes and Pharisees concerning the sabbath day, on the bodily rest of which they laid greater stress and required greater strictness than the Law-giver intended.
Commenting on Luke 6:1-11
Verse 4. No entry from BARNES for this verse. (d) "which it is not lawful"
After this verse, the Codex Bezae and two ancient MSS. quoted by Wechel, have the following extraordinary addition: Τῃ αυτῃ ἡμερᾳ θεασαμενος τινα εργαζομενον τῳ σαββατῳ, ειπεν αυτῳ, Ανθρωπε, ει μεν οιδας τι ποιεις μακαριος ει; ει δε μη οιδας επικαταρατος, και παραβατης ειτου νομου.