Verse 37. - And Isaac answered and said unto Esau (repeating the substance of the Messing already conferred on Jacob), Behold, I have made him thy lord, - literally, behold, a lord (vide on ver. 29) have I constituted him to thee; Isaac hereby intimating that in pronouncing the words of blessing he had been speaking under a celestial impulse, and therefore with absolute authority - and all his brethren have I given to him for servants (for the fulfillment vide 2 Samuel 8:14), and with corn and wine have I sustained him: - i.e. declared that by these he shall be sustained or supported (cf. ver. 28) - and what shall I do now unto thee, my son?

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.And Isaac answered and said unto Esau,.... Giving an account of the blessing be had bestowed upon his brother:

behold, I have made him thy lord; the lord of his posterity, who would be subdued and become tributary to his seed:

and all his brethren have I given to him for servants; the Edomites, who sprung from his brother Esau, who, according to this prophetic blessing, became servants to David, who was a son of Jacob's; see Gill on Genesis 27:29,

and with corn and wine have I sustained him; promised him a fruitful country, the land of Canaan, abounding with all good things, particularly with corn and wine, which are put for all the rest:

and what shall I do now unto thee, my son? what is there remains? what can be bestowed upon thee? there is nothing left; dominion over others, even over all nations, yea, over thyself and thy posterity, and plenty of all good things, are given already to Jacob; what is there to be done for thee, or thou canst expect?