2 Chronicles 18:29
And the king of Israel said unto Jehoshaphat, I will disguise myself, and will go to the battle; but put thou on thy robes. So the king of Israel disguised himself; and they went to the battle. And the king of Israel said unto Jehoshaphat, I will disguise myself, and will go to the battle; but put thou on thy robes. So the king of Israel disguised himself; and they went to the battle.
The verse records the arrangement of the two kings as they prepared to enter battle together at Ramoth-gilead. They went forward into that battle despite the warning Micaiah had given against it. The battle ended with the death of Ahab. In this his death fulfilled the prophet's warning that Israel would be scattered and would return home.