John Chrysostom — as excerpted in the Catena Aurea on Matthew 9:36-38

“The Lord would refute by actions the charge of the Pharisees, who said, He casteth out dæmons by the Prince of the dæmons; for a dæmon having suffered rebuke, does not return good but evil to those who have not shewn him honour. But the Lord on the other hand, when He has suffered blasphemy and contumely, not only does not punish, but does not utter a hard speech, yea He shews kindness to them that did it, as it here follows, And Jesus went about all their towns and villages. Herein He teaches us not to return accusations to them that accuse us, but kindness. For he that ceases to do good because of accusation, shews that his good has been done because of men. But if for God’s sake you do good to your fellow-servants, you will not cease from doing good whatever they do, that your reward may be greater.”