וַיְהִ֖י בַּשָּׁנָ֣ה הַשְּׁלִישִׁ֑ית וַיֵּ֛רֶד יְהוֹשָׁפָ֥ט מֶֽלֶךְ־יְהוּדָ֖ה אֶל־מֶ֥לֶךְ יִשְׂרָאֵֽל׃
And it came to pass in the third year, that Jehoshaphat the king of Judah came down to the king of Israel.
Read kabbalistic (mystical) interpretation of I Kings 22:2: and classical mystical sources.