It might have been expected that Jehoshaphat would have withdrawn from the expedition when he heard Micaiah denounce it. He had, however, rashly committed himself to take part in the war by a solemn promise, before he bethought himself of inquiring what was the will of God in the matter. Now he was ashamed to draw back, especially as Ahab, whom the prophecy chiefly threatened, was resolved to brave it. He may also have had a personal affection for Ahab, and so have been loth to desert him in his need. Compare 2 Chronicles 19:2.

So the king of Israel, and Jehoshaphat the king of Judah, went up to Ramothgilead. Which, according to Bunting (r), was twenty four miles from Samaria. That Ahab went is no wonder, it was his own motion first, his inclination led to it, his prophets encouraged him, and, in bravado to the prophet of the Lord, was determined upon it; but it may seem much more strange that Jehoshaphat should, after such an account as Micaiah had given, and who, doubtless, could observe a great difference between him and the prophets of Ahab; and yet there is much to be said which might incline him to go, as that there were four hundred prophets all agreed, and who made use of the name of the Lord, and pretended to be true prophets; and though he might suspect them, he could not confute them; and Micaiah, he prophesied evil of Ahab only, and therefore Jehoshaphat might think himself safe in going; and besides, he had given his word to Ahab, and he did not choose to go from it; to which may be added, that Ahab's cause was just, to recover a part of his own dominions.

(r) Travels, &c. p. 178.

The issue of the war, and death of Ahab. - 1 Kings 22:29. Ahab, disregarding Micah's prophecy, went on with the expedition, and was even joined by Jehoshaphat, of whom we should have thought that, after what had occurred, he at any rate would have drawn back. He was probably deterred by false shame, however, from retracting the unconditional promise of help which he had given to Ahab, merely in consequence of a prophetic utterance, which Ahab had brought against his own person from Micah's subjective dislike. But Jehoshaphat narrowly escaped paying the penalty for it with his life (v. 32), and on his fortunate return to Jerusalem had to listen to a severe reproof from the prophet Jehu in consequence (2 Chronicles 19:2).

So the king of Israel and Jehoshaphat the king of Judah went up to Ramothgilead.

29-38. went up to Ramoth-gilead-The king of Israel, bent on this expedition, marched, accompanied by his ally, with all his forces to the siege; but on approaching the scene of action, his courage failed, and, hoping to evade the force of Micaiah's prophecy by a secret stratagem, he assumed the uniform of a subaltern, while he advised Jehoshaphat to fight in his royal attire. The Syrian king, with a view either to put the speediest end to the war, or perhaps to wipe out the stain of his own humiliation (1Ki 20:31), had given special instructions to his generals to single out Ahab, and to take or kill him, as the author of the war. The officers at first directed their assault on Jehoshaphat, but, becoming aware of their mistake, desisted. Ahab was wounded by a random arrow, which, being probably poisoned, and the state of the weather increasing the virulence of the poison, he died at sunset. The corpse was conveyed to Samaria; and, as the chariot which brought it was being washed, in a pool near the city, from the blood that had profusely oozed from the wound, the dogs, in conformity with Elijah's prophecy, came and licked it [1Ki 21:19]. Ahab was succeeded by his son Ahaziah [1Ki 22:40].

22:29-40 Ahab basely intended to betray Johoshaphat to danger, that he might secure himself. See what they get that join with wicked men. How can it be expected that he should be true to his friend, who has been false to his God! He had said in compliment to Ahab, I am as thou art, and now he was indeed taken for him. Those that associate with evil-doers, are in danger of sharing in their plagues. By Jehoshaphat's deliverance, God let him know, that though he was displeased with him, yet he had not deserted him. God is a friend that will not fail us when other friends do. Let no man think to hide himself from God's judgment. God directed the arrow to hit Ahab; those cannot escape with life, whom God has doomed to death. Ahab lived long enough to see part of Micaiah's prophecy accomplished. He had time to feel himself die; with what horror must he have thought upon the wickedness he had committed!