I Kings 22:29 Halakhah

וַיַּ֧עַל מֶֽלֶךְ־יִשְׂרָאֵ֛ל וְיהוֹשָׁפָ֥ט מֶֽלֶךְ־יְהוּדָ֖ה רָמֹ֥ת גִּלְעָֽד׃

So the king of Israel and Jehoshaphat the king of Judah went up to Ramoth-gilead.

Read halakhic rulings (Jewish law) on I Kings 22:29: and classical halakhic sources.