Jamieson, Fausset and Brown on Genesis 36:6-7

6-7. Esau ... went into the country from the face of his brother Jacob--literally, "a country," without any certain prospect of a settlement. The design of this historical sketch of Esau and his family is to show how the promise (Ge 27:39, 40) was fulfilled. In temporal prosperity he far exceeds his brother; and it is remarkable that, in the overruling providence of God, the vast increase of his worldly substance was the occasion of his leaving Canaan and thus making way for the return of Jacob.