2 Samuel 16:9

What need is there to be troubled when we hear abuse? Why do we not imitate him who says, "I was dumb and humbled myself, and kept silence even from good words." Or did David only say this, and not act up to it? No, he also acted up to it. For when Shimei the son of Gera reviled him, David was silent; and although he was surrounded with armed men he did not return the abuse, nor seek revenge: no, even when the son of Zeruiah spoke to him, because he wished to take vengeance on him, David did not permit it. He went on as though dumb and humbled; he went on in silence; nor was he disturbed, although called a bloody man, though he was conscious of his own gentleness. He therefore was not disturbed by insults, for he had full knowledge of his own good works.He, then, who is quickly roused by wrong makes himself seem deserving of insult, even while he wishes to be shown not to deserve it. He who despises wrongs is better off than he who grieves over them. For he who despises them looks down on them, as though he doesn't feel them; but he who grieves over them is tormented, just as though he actually felt them.

We can show, too, that holy David was like Paul in this same class of virtue. When … Shimei cursed him and charged him with heavy offenses, at the first he was silent and humbled himself, and was silent even about his good deeds, that is, his knowledge of good works. Then he even asked to be cursed; for when he was cursed he hoped to gain divine pity.But see how he stored up humility and justice and prudence so as to merit grace from the Lord! At first he said, "Therefore he cursed me, because the Lord has said to him that he should curse." Here we have humility; for he thought that those things which are divinely ordered were to be endured with an even mind, as though he were but some servant lad. Then he said, "Behold, my son, who came forth of my body, seeks my life." Here we have justice. For if we suffer hard things at the hand of our own family, why are we angry at what is done to us by strangers? Lastly he says, "Let him alone that he may curse, for the Lord has bidden him. It may be that the Lord will look on my humiliation and requite me good for this cursing." So he bore not only the abuse but left the man unpunished when throwing stones and following him. No, even more. After his victory he freely granted him pardon when he asked for it. I have written to show that holy David, in true evangelical spirit, was not only not offended but was even thankful to his abuser and was delighted rather than angered by his wrongs, for which he thought some return would be granted to him. But, though perfect, he sought something still more perfect. As a man he grew hot at the pain of his wrongs, but like a good soldier he conquered, he endured like a brave wrestler.