Matthew Henry on 2 Chronicles 18:4-27
This is almost word for word the same with what we had, 1 Kings 22. We will not repeat what was there said, nor have we much to add, but may take occasion to think, 1. Of the great duty of acknowledging God in all our ways and enquiring at his word, whatever we undertake. Jehoshaphat was not willing to proceed till he had done this, Ch2 18:4. By particular believing prayer, by an unbiased consultation of the scripture and our own consciences, and by an observant regard to the hints of providence, we may make such enquiries and very much to our satisfaction. 2. Of the great danger of bad company even to good men. Those that have more wisdom, grace, and resolution, cannot be sure that they can…
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Then there came out a spirit - The Targum gives a strange gloss here: "Then the spirit of Naboth of Jezreel came out from the abode of the righteous, and stood before the Lord, and said, I will deceive him. And the Lord said, By what means? To which he answered, I will be a spirit of false prophecy in the mouth of his prophets. And the Lord said, Thou mayest then. But although the power of deceiving them is given unto thee, nevertheless it will not be lawful for thee to sit among the righteous; for whosoever shall speak falsely cannot have a mansion among the righteous. Therefore go forth from me, and do as thou hast said." - Targum.
John Gill on 2 Chronicles 18:2
And after certain years,.... Two years, according to the Syriac and Arabic versions, or in the third year after the affinity was contracted, see 1 Kings 22:2,
he went down to Ahab to Samaria; to pay him a visit upon the alliance, civil and matrimonial, contracted between them:
and Ahab killed sheep and oxen for him in abundance, and for the people that he had with him; entertained him and his retinue in a very grand and liberal manner:
and persuaded him to go up with him to Ramothgilead; from hence, to the end of the chapter, it is the same with 1 Kings 22:4.
Tyndale Open Study Notes on 2 Chronicles 18:18-22