Theophylact of Ohrid — as excerpted in the Catena Aurea on Mark 3:1-5

“After confounding the Jews, who had blamed His disciples, for pulling the ears of corn on the sabbath day, by the example of David, the Lord now further bringing them to the truth, works a miracle on the sabbath; shewing that, if it is a pious deed to work miracles on the sabbath for the health of men, it is not wrong to do on the sabbath things necessary for the body: he says therefore, And he entered again into the synagogue; and there was a man there which had a withered hand. And they watched him, whether he would heal him on the sabbath-day; that they might accuse him.”