Genesis 27:40

And by thy sword shalt thou live, war, pillage, and robbery being almost necessary in the barren land which would be his habitation, and shalt serve thy brother; and it shall come to pass when thou shalt have the dominion, that thou shalt break his yoke from off thy neck. History shows that this prophecy was fulfilled. "Edom was at first strong and independent as compared to Israel, slower in its development (Numbers 20:14). Saul first fought against it victoriously (1 Samuel 14:47); David conquered it (2 Samuel 8:14). Then followed a conspiracy under Solomon (1 Kings 11:14), whilst there was an actual defection under Joram. On the other hand, the Edomites were again subjected by Amaziah (2 Kings 14:7; 2 Chronicles 25:11) and remained dependent under Uzziah and Jotham (2 Kings 14:22; 2 Chronicles 26:2). But under Ahaz they liberated themselves entirely from Judah (2 Kings 16:6; 2 Chronicles 28:17). Finally, however, John Hyrcanus subdued them completely, and incorporated them into the Jewish state and people, whilst the Jews themselves, however, after Antipater, became subject to the dominion of an Idumean dynasty, until the downfall of their state. "