II Kings 8:20-22

In his days Edom revolted against Judah’s authority, and made a king over themselves. So Joram went to Zair, and all his chariots with him. Then he rose by night and attacked the Edomites who had surrounded him and the captains of the chariots; and the troops fled to their tents. Thus Edom has been in revolt against Judah’s authority to this day. And Libnah revolted at that time.