Verse 1
Now Jehoshaphat had riches and honour in abundance, and joined affinity with Ahab. No JFB commentary on this verse.
Verse 2
And after certain years he went down to Ahab to Samaria. And Ahab killed sheep and oxen for him in abundance, and for the people that he had with him, and persuaded him to go up with him to Ramoth-gilead.
After certain years he went down to Ahab to Samaria. This is word for word the same as 1 Kings 22:1-53. (See Commentary on that chapter.)