John Chrysostom

After this He mentions another reason likewise; "For the Son of man," saith He, "is Lord of the Sabbath day;" speaking it of Himself. But Mark relates Him to have said this of our common nature also; for He said, "The Sabbath was made for man, not man for the Sabbath." Wherefore then was he punished that was gathering the sticks? Because if the laws were to be despised even at the beginning, of course they would scarcely be observed afterwards. …

Homily on the Gospel of Matthew 39 ↗

Jerome

And when he had passed from there, he came into their synagogue. And behold, there was a man with a withered hand. This is the thirteenth one who is healed in the synagogue. And it should be noted that his hand was healed not on the road or outside, but in the council of the Jews.

Commentary on Matthew ↗

Thomas Aquinas

There is another argument which makes them innocent, namely, obedience; hence they can do these things, because he ordered them, for the Son of man is Lord of the Sabbath, and the lawgiver is not subject to the law: "He is our lawgiver" (Is 33:22); therefore, he has the power, because he has the authority.

Commentary on Matthew ↗

Victorinus of Pettau

And let the parasceve become a rigorous fast, lest we should appear to observe any Sabbath with the Jews, which Christ Himself, the Lord of the Sabbath, says by His prophets that "His soul hateth," which Sabbath He in His body abolished, although, nevertheless, He had formerly Himself commanded Moses that circumcision should not pass over the eighth day, which day very frequently happens on the Sabbath, as we read written in the Gospel.

On the Creation of the World ↗