וַיֹּ֥אמֶר מֶֽלֶךְ־יִשְׂרָאֵ֖ל אֶל־יְהוֹשָׁפָ֑ט הֲלוֹא֙ אָמַ֣רְתִּי אֵלֶ֔יךָ לֽוֹא־יִתְנַבֵּ֥א עָלַ֛י ט֖וֹב כִּ֥י אִם־רָֽע׃
And the king of Israel said to Jehoshaphat: ‘Did I not tell thee that he would not prophesy good concerning me, but evil?’
Read halakhic rulings (Jewish law) on I Kings 22:18 from the Mishneh Torah and classical halakhic sources, free online.