2 Kings 9:8

For the whole house of Ahab shall perish That is, all his posterity and all his kindred. Jehu, therefore, having received such a charge, is to be considered, in what he afterward did to the house of Ahab, as acting not out of a spirit of revenge, for he had no quarrel with the house of Ahab; but, as the minister of God, who, by his prophet, authorized and enjoined him to do what follows.