2 Chronicles 18:1

So Yahweh established the kingdom in his hand, and all Judah brought presents to Jehoshaphat, and he had great riches and honor.

And Jehu the son of Hanani the seer went out to meet him to his face and said to King Jehoshaphat, “Should you help the wicked and love those who hate Yahweh and so bring wrath on yourself from Yahweh?

And he walked in the way of the kings of Israel, just as the house of Ahab had done, for Ahab’s daughter was his wife; and he did what was evil in the sight of Yahweh.

Jehoshaphat Allies with Ahab