'First born' in the Bible
And the firstborn said to the younger, Our father is old, and there is not a man on the earth to come in to 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 did not know when she lay down, nor when she arose.
And it came to pass on the morrow, that the firstborn said to the younger, Behold, I lay last night with my father. Let us make him drink wine this night also, and go thou in, and lay with him, that we may preserve seed by our fath
And the firstborn bore a son, and called his name Moab. The same is the father of the Moabites to this day.
Uz his first born, 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 to his father, I am Esau thy firstborn. I have done according as thou bade me. Arise, I pray thee, sit and eat of my venison, that thy soul may bless me.
And Isaac his father said to him, Who are thou? And he said, I am thy son, thy firstborn, Esau.
And Laban said, It is not so done in our place, 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 are the chiefs of the sons of Esau: The sons of Eliphaz the firstborn of Esau: chief Teman, chief Omar, chief Zepho, chief Kenaz,
And Judah took a wife for Er his firstborn, and her name was Tamar.
And Er, Judah's firstborn, was wicked in the sight of LORD, and LORD killed him.
And Joseph called the name of the firstborn Manasseh, for, God 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 with another.
And these are the names of the sons of Israel who came into Egypt with their father Jacob, Jacob and his sons: The firstborn of Jacob, Reuben.
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 deliberately, for Manasseh was the firstborn.
And Joseph said to his father, Not so, my father, for this is the firstborn, put thy right hand upon his head.
Reuben, thou are my firstborn, my might, and the beginning of my strength, the pre-eminence of dignity, and the pre-eminence of power.