Jehoshaphat, with characteristic piety 1 Kings 22:43 takes advantage of his position as Ahab's friend and ally, to suggest inquiry of the Lord (Yahweh) before the expedition is undertaken. Lest Ahab should consent in word and put off the inquiry in act, he asks to have the prophets called in at once: "today."

And Jehoshaphat said unto the king of Israel, inquire, I pray thee, at the word of the Lord today. Being a pious and religious prince, he did not choose to go into a war at once, without consulting the Lord by his prophets, whether it was his will and pleasure they should engage in it, and should prosper; and he was desirous of having this done immediately, before they proceeded any further.

But as Jehoshaphat wished also to inquire the word of the Lord concerning the war, Ahab gathered together about 400 prophets, who all predicted as out of one mouth a prosperous result to the campaign. These 400 prophets are neither the 400 prophets of Asherah who had not appeared upon Carmel when Elijah was there (1 Kings 18:19-20), nor prophets of Baal, as some of the earlier commentators supposed, since Ahab could not inquire of them את־דּבר יהוה. On the other hand, they were not "true prophets of Jehovah and disciples of the prophets" (Cler., Then.), but prophets of Jehovah worshipped under the image of an ox, who practised prophesying as a trade without any call from God, and even if they were not in the pay of the idolatrous kings of Israel, were at any rate in their service. For Jehoshaphat did not recognise them as genuine prophets of Jehovah, but inquired whether there was not such a prophet still in existence (1 Kings 22:7), that they might inquire the will of the Lord of him (מאותו).

And Jehoshaphat said unto the king of Israel, {e} Enquire, I pray thee, at the word of the LORD to day.

(e) He seemed that he would not go to war unless God approved it, yet when Michaiah advised the opposite he would not obey.

22:5 Enquire - A good man, wherever he goes, will take God along with him, will acknowledge him in all his ways, and look to him for success. And wherever he goes, he ought to take his religion along with him: and not be ashamed to own it, even among those who have no kindness for it.

22:1-14 The same easiness of temper, which betrays some godly persons into friendship with the declared enemies of religion, renders it very dangerous to them. They will be drawn to wink at and countenance such conduct and conversation as they ought to protest against with abhorrence. Whithersoever a good man goes, he ought to take his religion with him, and not be ashamed to own it when he is with those who have no regard for it. Jehoshaphat had not left behind him, at Jerusalem, his affection and reverence for the word of the Lord, but avowed it, and endeavoured to bring it into Ahab's court. And Ahab's prophets, to please Jehoshaphat, made use of the name of Jehovah: to please Ahab, they said, Go up. But the false prophets cannot so mimic the true, but that he who has spiritual senses exercised, can discern the fallacy. One faithful prophet of the Lord was worth them all. Wordly men have in all ages been alike absurd in their views of religion. They would have the preacher fit his doctrine to the fashion of the times, and the taste of the hearers, and yet to add. Thus saith the Lord, to words that men would put into their mouths. They are ready to cry out against a man as rude and foolish, who scruples thus to try to secure his own interests, and to deceive others.