Gen 25:31 Jacob said, “Sell me your birthright now.”
Gen 25:32 Esau said, “I am about to die; of what use is a birthright to me?”
Gen 25:33 Jacob said, “Swear to me now.” So he swore to him and sold his birthright to Jacob.
Gen 25:34 Then Jacob gave Esau bread and lentil stew, and he ate and drank and rose and went his way. Thus Esau despised his birthright.

Gen 27:36 Esau said, “Is he not rightly named Jacob? For he has cheated me these two times. He took away my birthright, and behold, now he has taken away my blessing.” Then he said, “Have you not reserved a blessing for me?”
Gen 43:33 And they sat before him, the firstborn according to his birthright and the youngest according to his youth. And the men looked at one another in amazement.
Deu 21:17 but he shall acknowledge the firstborn, the son of the unloved, by giving him a double portion of all that he has, for he is the firstfruits of his strength. The right of the firstborn is his.

1Ch 5:1 The sons of Reuben the firstborn of Israel ( for he was the firstborn, but because he defiled his father’s couch, his birthright was given to the sons of Joseph the son of Israel, so that he could not be enrolled as the oldest son;
1Ch 5:2 though Judah became strong among his brothers and a chief came from him, yet the birthright belonged to Joseph),
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