And Jacob said, Sell me this day thy birthright.
And Esau said, Behold, I am at the point to die: and what profit shall this birthright do to me?
And Jacob said, Swear to me this day; and he sware unto him: and he sold his birthright unto Jacob.
Then Jacob gave Esau bread and pottage of lentils; and he did eat and drink, and rose up, and went his way: thus Esau despised his birthright.
Genesis 25:31-34
And he said, Is not he rightly named Jacob? for he hath supplanted me these two times: he took away my birthright; and, behold, now he hath taken away my blessing. And he said, Hast thou not reserved a blessing for me?
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 corn and wine have I sustained him: and what shall I do now unto 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.
Genesis 27:36-38
And they sat before him, the firstborn according to his birthright, and the youngest according to his youth: and the men marveled one at another.
Genesis 43:33
Now the sons of Reuben the firstborn of Israel, (for he was the firstborn; but forasmuch as he defiled his father's bed, his birthright was given unto the sons of Joseph the son of Israel: and the genealogy is not to be reckoned after the birthright.
For Judah prevailed above his brethren, and of him came the chief ruler; but the birthright was Joseph's:)
The sons, I say, of Reuben the firstborn of Israel were, Hanoch, and Pallu, Hezron, and Carmi.
1 Chronicles 5:1-3
Lest there be any fornicator, or profane person, as Esau, who for one morsel of meat sold his birthright.
Hebrews 12:16