2 Chronicles 21:8
In his days the Edomites revolted from under the dominion of Judah, and made themselves a king. (2 Chronicles 21:8)
The Edomites revolted.
 During the reign of Jehoshaphat, Edom had no king (1 Kings 22:47), and the country seems to have been under the control of Judah, for Jehoshaphat based his navy at Ezion-geber (2 Chron. 20:36), south of Edom.