Esau is Edom.
As it is written, Jacob have I loved, but Esau have I hated.
And I hated Esau, and laid his mountains and his heritage waste for the dragons of the wilderness. Whereas Edom saith, We are impoverished, but we will return and build the desolate places; thus saith the Lord of hosts, They shall build, but I will throw down; and they shall call them, The border of wickedness, and, The people against whom the Lord hath indignation for ever.
And the house of Jacob shall be a fire, and the house of Joseph a flame, and the house of Esau for stubble, and they shall kindle in them, and devour them; and there shall not be any remaining of the house of Esau; for the LORD hath spoken it.