2 Kings 11:1

i.e. All of the royal family left after those slaughters, 2 Chronicles 21:2,2 Chronicles 21:4; 2 Chronicles 22:1; 2 Kings 10:13,2 Kings 10:14, except one, as the next verse limits and explains it. This she did, partly, out of rage at the extirpation of her family, resolving that David’s family should not outlive liers; partly, from ambition and desire of rule, for which many persons have destroyed their nearest relations; partly, from the zeal which she had for idolatry, and the worship of Baal, which she intended to establish, to which she knew the house of David were implacable enemies; and partly, in her own defence, that she might secure herself from Jehu’s fury, who was commanded by God, and resolved in himself, utterly to destroy all the branches of Ahab’s family, whereof she was one, 2 Kings 8:18,2 Kings 8:26; for had she not done this, she suspected that either the king or people of Judah would have delivered her up to Jehu upon his demand. Possibly those whom she slew were Joram’s children by another wife; of which See Poole "2 Kings 1:2". And this was the fruit of Jehoshaphat’s marrying his son to a daughter of that idolatrous and wicked house of Ahab, even the extirpation of all his posterity but one. And this dreadful judgment God permitted, and inflicted upon him and his, to show how much he abhors all such sinful and unequal affinities.