And Abel also presented an offering—some of the firstborn of his flock and their fat portions. The Lord had regard for Abel and his offering,

Canaan fathered Sidon his firstborn, then Heth,

Then the firstborn said to the younger, “Our father is old, and there is no man in the land to sleep with us as is the custom of all the land.

So they got their father to drink wine that night, and the firstborn came and slept with her father; he did not know when she lay down or when she got up.

The next day the firstborn said to the younger, “Look, I slept with my father last night. Let’s get him to drink wine again tonight so you can go sleep with him and we can preserve our father’s line.”

The firstborn gave birth to a son and named him Moab. He is the father of the Moabites of today.

Uz his firstborn, his brother Buz, Kemuel the father of Aram,

These are the names of Ishmael’s sons; their names according to the family records are: Nebaioth, Ishmael’s firstborn, then Kedar, Adbeel, Mibsam,

Jacob replied to his father, “I am Esau, your firstborn. I have done as you told me. Please sit up and eat some of my game so that you may bless me.”

But his father Isaac said to him, “Who are you?”

He answered, “I am Esau your firstborn son.”

Laban answered, “It is not the custom in this place to give the younger daughter in marriage before the firstborn.

Leah’s sons were Reuben (Jacob’s firstborn),
Simeon, Levi, Judah,
Issachar, and Zebulun.

These are the chiefs of Esau’s sons:
the sons of Eliphaz, Esau’s firstborn:
Chiefs Teman, Omar, Zepho, Kenaz,

Judah got a wife for Er, his firstborn, and her name was Tamar.

Now Er, Judah’s firstborn, was evil in the Lord’s sight, and the Lord put him to death.

Joseph named the firstborn Manasseh, meaning, “God has made me forget all my hardship in my father’s house.”

They were seated before him in order by age, from the firstborn to the youngest. The men looked at each other in astonishment.

These are the names of the Israelites, Jacob and his sons, who went to Egypt:

Jacob’s firstborn: Reuben.

But Israel stretched out his right hand and put it on the head of Ephraim, the younger, and crossing his hands, put his left on Manasseh’s head, although Manasseh was the firstborn.

Joseph said to his father, “Not that way, my father! This one is the firstborn. Put your right hand on his head.”

Reuben, you are my firstborn,
my strength and the firstfruits of my virility,
excelling in prominence, excelling in power.