Genesis 27:37-40

And Isaac answered and said unto Esau, Behold, I have made him thy lord, and all his brethren have I given to him for servants; and with grain and new wine have I sustained him: and what then shall I do for thee, my son? And Esau said unto his father, Hast thou but one blessing, my father? bless me, even me also, O my father. And Esau lifted up his voice, and wept. And Isaac his father answered and said unto him, Behold, of the fatness of the earth shall be thy dwelling, And of the dew of heaven from above; And by thy sword shalt thou live, and thou shalt serve thy brother; And it shall come to pass, when thou shalt break loose, That thou shalt shake his yoke from off thy neck.