And the king of Israel said to Jehoshaphat, “I will disguise myself and go into battle, but you wear your robes.” And the king of Israel disguised himself, and they went into battle.
We have here, 1. Good Jehoshaphat exposing himself in his robes, thereby endangered, and yet delivered. We have reason to think that Ahab, while he pretended friendship, really aimed at Jehoshaphat's life, to take him off, that he might have the management of his successor, who was his son-in-law, else he would never have advised him to enter into the battle with his robes on...
Commenting on 2 Chronicles 18:28-34
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. (s) Thus the wicked think by their own subtilty to escape God's judgments which he threatens by his word.
I will disguise myself - See the note on Kg1 22:30.