2 Samuel 16:9-10

Then Abishai the son of Zeruiah said to the king, “Why should this dead dog curse my lord the king? Let me go over and take off his head.” But the king said, “What have I to do with you, you sons of Zeruiah? If he is cursing because the LORD has said to him, ‘Curse David,’ who then shall say, ‘Why have you done so?’”