1 Kings 22:18 - Joseph Benson’s Commentary on the Old and New Testaments

The king of Israel said, Did not I tell thee, &c. Now thou seest my words verified, and how this man shows his hatred by his malignant and treasonable prophecy, and how little regard is to be paid to his words. Which crafty insinuation seems to have had too great an influence on good Jehoshaphat, otherwise he would not have gone to the battle. That he would prophesy no good concerning me, but evil Nay, but what evil was it to tell him what would be the event if he proceeded in his expedition, while it was in his own power whether he would proceed or not? The greatest kindness we can do to one that is walking in a dangerous way is to tell him of his danger.