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. For their riches were more than that they might dwell together; and the land could not bear them because of their cattle. So Esau dwelt in mount Seir.
Matthew Henry’s Consise Commentary states:
Mount Seir is called the land of their possession. Canaan was at this time only the land of promise. Seir was in the possession of the Edomites. The children of this world have their all in hand, and nothing in hope; while the children of God have their all in hope, and next to nothing in hand. But, all things considered, it is beyond compare better to have Canaan in promise, than mount Seir in possession.