In his days the Edomites revolted from under the dominion of Judah, and made themselves a king.

In those days Edom revolted, from being subject to Juda, and made themselves a king.

In his days Edom revolted from under the hand of Judah, and they set a king over themselves.

In his days hath Edom revolted from under the hand of Judah, and cause a king to reign over them;

In his time Edom made themselves free from the rule of Judah, and took a king for themselves.

In those days, Edom rebelled, so as not to be subject to Judah, and they appointed for themselves a king.

In his days the Edomites revolted - See on 2-Kings 8:21 (note).

EDOM AND LIBNAH REVOLT. (2-Chronicles 21:8-17)
the Edomites revolted--That nation had been made dependent by David, and down to the time of Jehoshaphat was governed by a tributary ruler (1-Kings 22:47; 2-Kings 3:9). But that king having been slain in an insurrection at home, his successor thought to ingratiate himself with his new subjects by raising the flag of independence [JOSEPHUS]. The attempt was defeated in the first instance by Jehoram, who possessed all the military establishments of his father; but being renewed unexpectedly, the Edomites succeeded in completely emancipating their country from the yoke of Judah (Genesis 27:40). Libnah, which lay on the southern frontier and towards Edom, followed the example of that country.