וַ֠יָּשֻׁבוּ כָּל־אִ֨ישׁ יְהוּדָ֤ה וִֽירוּשָׁלִַ֙ם֙ וִֽיהוֹשָׁפָ֣ט בְּרֹאשָׁ֔ם לָשׁ֥וּב אֶל־יְרוּשָׁלִַ֖ם בְּשִׂמְחָ֑ה כִּֽי־שִׂמְּחָ֥ם יְהוָ֖ה מֵֽאוֹיְבֵיהֶֽם׃
Then they returned, every man of Judah and Jerusalem, and Jehoshaphat in the forefront of them, to go back to Jerusalem with joy; for the LORD had made them to rejoice over their enemies.
Read halakhic rulings (Jewish law) on II Chronicles 20:27: and classical halakhic sources.