Edom: It Extended from the Elanitic Gulf to the Red Sea, and Was Also Called Idumea
Source: Nav
Genesis 32:3
Jacob sent messengers ahead of him to his brother Esau in the land of Seir, the country of Edom.
Genesis 36:16, 17, 21
Korah, Gatam, and Amalek. They are the chiefs of Eliphaz in the land of Edom, and they are the grandsons of Adah. / These are the sons of Esau’s son Reuel: Chiefs Nahath, Zerah, Shammah, and Mizzah. They are the chiefs descended from Reuel in the land of Edom, and they are the grandsons of Esau’s wife Basemath. / Dishon, Ezer, and Dishan. They are the chiefs of the Horites, the descendants of Seir in the land of Edom.
Jeremiah 40:11
When all the Jews in Moab, Ammon, Edom, and all the other lands heard that the king of Babylon had left a remnant in Judah and had appointed Gedaliah son of Ahikam, the son of Shaphan, over them,