Genesis 27:37-40

37Isaac answered and said to Esau, "Behold, I have made him lord over you, and all his brothers I have given to him for servants, and with grain and wine I have sustained him. What then can I do for you, my son?"

38Esau said to his father, "Have you but one blessing, my father? Bless me, even me also, O my father." And Esau lifted up his voice and wept.

39Then Isaac his father answered and said to him: "Behold, away from the fatness of the earth shall your dwelling be, and away from the dew of heaven on high.

40By your sword you shall live, and you shall serve your brother; but when you grow restless you shall break his yoke from your neck."