2 Chronicles 21:8-10

8During Jehoram’s reign, the Edomites revolted against Judah and crowned their own king.

9So Jehoram went out with his full army and all his chariots. The Edomites surrounded him and his chariot commanders, but he went out at night and attacked them under cover of darkness.

10Even so, Edom has been independent from Judah to this day. The town of Libnah also revolted about that same time. All this happened because Jehoram had abandoned the Lord, the God of his ancestors.