The descendants of Esau had eight kings before there reigned any king over the descendants of Jacob. But a time came when the Jews had eight kings during whose reign the Edomites had none and were subject to the Jewish kings. This was the time that intervened between Saul, the first Israelitish king, who ruled over Edom, and Jehoshaphat, for Edom did not make itself independent of Jewish rule until the time of Joram, the son of Jehoshaphat.
There was a difference between the kings of Esau's seed and the kings of Jacob's seed. The Jewish people always produced their kings from their own midst, while the Edomites had to go to alien peoples to secure theirs. The first Edomite king was the Aramean Balaam, called Bela in his capacity as ruler of Edom. His successor Job, called Jobab also, came from Bozrah, and for furnishing Edom with a king this city will be chastised in time to come. When God sits in judgment on Edom, Bozrah will be the first to suffer punishment.