Genesis 36:7-8

36:7 because they had too many possessions to be able to stay together and the land where they had settled was not able to support them because of their livestock. 36:8 So Esau (also known as Edom) lived in the hill country of Seir.

Genesis 25:12

The Sons of Ishmael

25:12 This is the account of Abraham’s son Ishmael, whom Hagar the Egyptian, Sarah’s servant, bore to Abraham.

Deuteronomy 2:5

2:5 Do not be hostile toward them, because I am not giving you any of their land, not even a footprint, for I have given Mount Seir as an inheritance for Esau.