And Isaac his father answered and said unto him, Behold, thy dwelling shall be the fatness of the earth, and of the dew of heaven from above;

Wesley's Notes

27:39 Esau likewise obtained a blessing: yet it was far short of Jacob's. In Jacob's blessing the dew of heaven is put first, as that which he most valued and desired: in Esau's the fatness of the earth is put first, for that was it which he had the principal regard to. Esau hath these, but Jacob hath them from God's hand. God give thee the dew of heaven, Ge 27:28. It was enough to have the possession, but Jacob desired it by promise. Jacob shall have dominion over his brethren, for the Israelites often ruled over the Edomites. Esau shall have dominion, he shall gain some power, but shall never have dominion over his brother: we never find that the Jews were sold into the hands of the Edomites, or that they oppressed them. But the great difference is, that there is nothing in Esau's blessing that points at Christ, nothing that brings either him or his into the church, and without that the fatness of the earth, and the plunder of the field, will stand him in little stead. Thus Isaac by faith blessed them both, according as their lot should be.

King James Translators' Notes

the fatness: or, of the fatness

Jamieson-Fausset-Brown Bible Commentary

39, 40. Behold, thy dwelling shall be the fatness of the earth-The first part is a promise of temporal prosperity, made in the same terms as Jacob's [Ge 27:28]-the second part refers to the roving life of hunting freebooters, which he and his descendants should lead. Though Esau was not personally subject to his brother, his posterity were tributary to the Israelites, till the reign of Joram when they revolted and established a kingdom of their own (2Ki 8:20; 2Ch 21:8-10).

Matthew Henry's Concise Commentary

27:30-40 When Esau understood that Jacob had got the blessing, he cried with a great and exceeding bitter cry. The day is coming, when those that now make light of the blessings of the covenant, and sell their title to spiritual blessings for that which is of no value, will, in vain, ask urgently for them. Isaac, when made sensible of the deceit practised on him, trembled exceedingly. Those who follow the choice of their own affections, rather than the Divine will, get themselves into perplexity. But he soon recovers, and confirms the blessing he had given to Jacob, saying, I have blessed him, and he shall be blessed. Those who part with their wisdom and grace, their faith and a good conscience, for the honours, wealth, or pleasures of this world, however they feign a zeal for the blessing, have judged themselves unworthy of it, and their doom shall be accordingly. A common blessing was bestowed upon Esau. This he desired. Faint desires of happiness, without right choice of the end, and right use of the means, deceive many unto their own ruin. Multitudes go to hell with their mouths full of good wishes. The great difference is, that there is nothing in Esau's blessing which points at Christ; and without that, the fatness of the earth, and the plunder of the field, will stand in little stead. Thus Isaac, by faith, blessed both his sons, according as their lot should be.