בְּיָמָיו֙ פָּשַׁ֣ע אֱד֔וֹם מִתַּ֖חַת יַד־יְהוּדָ֑ה וַיַּמְלִ֥כוּ עֲלֵיהֶ֖ם מֶֽלֶךְ׃
In his days Edom revolted from under the hand of Judah, and made a king over themselves.
Read Kabbalistic (mystical) interpretations of II Kings 8:20: Zohar and classical Jewish mystical sources, free online.