2 Chronicles 21:5-9

5Jehoram was thirty-two years old when he became king, and he reigned eight years in Jerusalem.

6And he walked in the way of the kings of Israel, as the house of Ahab had done, for the daughter of Ahab was his wife. And he did what was evil in the sight of the Lord.

7Yet the Lord was not willing to destroy the house of David, because of the covenant that he had made with David, and since he had promised to give a lamp to him and to his sons forever.

8In his days Edom revolted from the rule of Judah and set up a king of their own.

9Then Jehoram passed over with his commanders and all his chariots, and he rose by night and struck the Edomites who had surrounded him and his chariot commanders.