John Gill Commentary Mark 2:28

"so that the Son of man is lord even of the sabbath." — Mark 2:28 (ASV)

Therefore the son of man is Lord also of the sabbath . ] Meaning himself, who had a power not only to dispense with it, but to abrogate it as he did, with the rest of the rituals of the ceremonial law; (See Gill on Matthew 12:8). So that it did not become them to find fault with what his disciples did, with his leave and approbation.