Ovadiah, a proselyte from Edom, who became a high priest. He hid and sustained 100 prophets at the height of Jezebel’s decimation of the prophets of Hashem (I Kings chapter 18). In turn, as a reward of his merit, this prophecy is given to him,

Jacob and Esau

The wickedness and haughtiness of Esau and its consequences.

Moreover his oppression against Israel.