Genesis 27:37-41

But Isaac replied to Esau, “Behold, I have made him your master, and I have given to him all his relatives as servants; and with grain and new wine I have sustained him. What then can I do for you, my son?”

Esau said to his father, “Do you have only one blessing, my father? Bless me, me as well, my father.” So Esau raised his voice and wept.

Then his father Isaac answered and said to him, “Behold, away from the fertility of the earth shall be your dwelling, And away from the dew of heaven from above.

“And by your sword you shall live, And you shall serve your brother; But it shall come about when you become restless, That you will break his yoke from your neck.”

So Esau held a grudge against Jacob because of the blessing with which his father had blessed him; and Esau said to himself, “The days of mourning for my father are near; then I will kill my brother Jacob.”