1 Kings 22:30 - Joseph Benson’s Commentary on the Old and New Testaments

The king of Israel said, I will disguise myself Put off my imperial habit, and appear as a private man, that the Syrians may not know me, and direct their main force against me. This he judged they would do, as knowing him to be the principal author of this war, and that it was likely to die with him. But put thou on thy robes Thy royal robes, which thou mayest do without danger, because thou art not the object of the rage of the Syrians, nor of this false prophecy. Thus, while he pretended to do honour to Jehoshaphat, and compliment him with the sole command of the army in this action, he hoped to elude the danger, and so defeat the threatening, as if by disguising himself he could escape the divine cognizance, and the judgments that pursued him.