For their riches were more than that they might dwell together; and the land wherein they were strangers could not bear them because of their cattle.
Esau and Jacob separate because their combined possessions are too great for the land to support.
King James Version (public domain)
Traditionally attributed to Moses · c. 13th century BC · The Pentateuch — Genesis, Exodus, Leviticus, Numbers, and Deuteronomy — is traditionally attributed to him
5And Aholibamah bare Jeush, and Jaalam, and Korah: these are the sons of Esau, which were born unto him in the land of Canaan.
6And Esau took his wives, and his sons, and his daughters, and all the persons of his house, and his cattle, and all his beasts, and all his substance, which he had got in the land of Canaan; and went into the country from the face of his brother Jacob.
7For their riches were more than that they might dwell together; and the land wherein they were strangers could not bear them because of their cattle.
8Thus dwelt Esau in mount Seir: Esau is Edom.
9And these are the generations of Esau the father of the Edomites in mount Seir: