After all that well digging, Isaac realizes that he's getting up there in age. In fact, he's old and blind.
He sends for his eldest son, Esau, and tells him to go kill an animal, cook it and bring it to him. Then, Jacob will give him his final blessing before he dies.
But, Rebecca overhears his plan. Since Jacob is her favorite, she wants him to be the one to get Isaac's final blessing.
She tells Jacob, "Go to the flock and pick out two fat young goats, so that I can cook them and make some of that food your father likes so much. You can take it to him to eat, and he will give you his blessing before he dies." [Genesis 27:9-10]
Jacob isn't as convinced that this plan will work. He reminds his mother that Esau is very hairy, so if his father touches him he'll realize that he isn't Esau.
Rebecca has a plan for that too. So, Jacob does what he's told, she cooks the goats and then takes the goat skin and places it on Jacob's arms and neck.
It works. Isaac says, "Your voice sounds like Jacob's voice, but your arms feel like Esau's arms." [Genesis 27:22]
Isaac asks one last time if he's Esau and Jacob reassures him that he is indeed Esau. So, Isaac eats the meat and gives Jacob the blessing meant for Esau.... "May nations be your servants, and may peoples bow down before you. May you rule over all your relatives, and may your mother's descendants bow down before you. May those who curse you be cursed, and may those who bless you be blessed." [Genesis 27:29]
As soon as Jacob leaves, Esau comes back from hunting. He makes his dad the food, and Isaac immediately realizes that he's been punk'd by Jacob.
"Isaac began to tremble and shake all over, and he asked, 'Who was it, then, who killed an animal and brought it to me? I ate it just before you came. I gave him my final blessing, and so it is his forever." [Genesis 27:33]
Esau demands that Isaac give him his blessing too, but Isaac seems to only be able to give out one.
Issac says, "I have already made him master over you, and I have made all his relatives his slaves. I have given him grain and wine. Now there is nothing that I can do for you, son!" [Genesis 27:37]
This is pretty crappy, really. That's why you don't give one son the power to make the rest of his relatives his slaves... that never works out!
Esau is, rightly, pretty pissed off. He thinks, "The time to mourn my father's death is near; then I will kill Jacob." [Genesis 27:41]
But, of course, Rebecca overhears this plan too. (I think all she does is walk around and eavesdrop on her family.) So, she sends Jacob to her brother Laban, hoping that Esau will cool off while Jacob is away. Always the quick thinker, she convinces Isaac that sending him away is a good idea, so Isaac is actually the one who sends him off... telling him to find a wife there.
