'First born' in the Bible
And the firstborn said unto the younger, Our father is old, and there is not a man on the earth to come in unto us after the manner of all the earth:
And they made their father drink wine that night: and the firstborn went in, and lay with her father; and he knew not when she lay down, nor when she arose.
And it came to pass on the next day, that the firstborn said unto the younger, Behold, I lay last night with my father: let us make him drink wine this night also; and you go in, and lie with him, that we may preserve descendants of our father.
And the firstborn bore a son, and called his name Moab: the same is the father of the Moabites unto this day.
Uz his firstborn, and Buz his brother, and Kemuel the father of Aram,
And these are the names of the sons of Ishmael, by their names, according to their generations: the firstborn of Ishmael, Nebaioth; and Kedar, and Adbeel, and Mibsam,
And Jacob said unto his father, I am Esau your firstborn; I have done according as you bade me: arise, I pray you, sit and eat of my venison, that your soul may bless me.
And Isaac his father said unto him, Who are you? And he said, I am your son, your firstborn Esau.
And Laban said, It must not be so done in our country, to give the younger before the firstborn.
The sons of Leah; Reuben, Jacob's firstborn, and Simeon, and Levi, and Judah, and Issachar, and Zebulun:
These were chiefs of the sons of Esau: the sons of Eliphaz the firstborn son of Esau; chief Teman, chief Omar, chief Zepho, chief Kenaz,
And Judah took a wife for Er his firstborn, whose name was Tamar.
And Er, Judah's firstborn, was wicked in the sight of the LORD; and the LORD slew him.
And Joseph called the name of the firstborn Manasseh: For God, said he, has made me forget all my toil, and all my father's house.
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.
And these are the names of the children of Israel, who came into Egypt, Jacob and his sons: Reuben, Jacob's firstborn.
And Israel stretched out his right hand, and laid it upon Ephraim's head, who was the younger, and his left hand upon Manasseh's head, guiding his hands knowingly; for Manasseh was the firstborn.
And Joseph said unto his father, Not so, my father: for this is the firstborn; put your right hand upon his head.
Reuben, you are my firstborn, my might, and the beginning of my strength, the excellency of dignity, and the excellency of power: