2 Chronicles 21:8-10

8During Jehoram’s reign Edom freed themselves from Judah’s control and set up their own king.

9Jehoram crossed over to Zair with his officers and all his chariots. The Edomites, who had surrounded him, attacked at night and defeated him and his chariot officers.

10So Edom has remained free from Judah’s control to this very day. At that same time Libnah also rebelled and freed themselves from Judah’s control because Jehoram rejected the Lord God of his ancestors.