'First born' in the Bible

You must say to Pharaoh, 'Thus says the Lord, "Israel is my son, my firstborn,

and I said to you, 'Let my son go that he may serve me,' but since you have refused to let him go, I will surely kill your son, your firstborn!"'"

These are the heads of their fathers' households: The sons of Reuben, the firstborn son of Israel, were Hanoch and Pallu, Hezron and Carmi. These were the clans of Reuben.

and all the firstborn in the land of Egypt will die, from the firstborn son of Pharaoh who sits on his throne, to the firstborn son of the slave girl who is at her hand mill, and all the firstborn of the cattle.

I will pass through the land of Egypt in the same night, and I will attack all the firstborn in the land of Egypt, both of humans and of animals, and on all the gods of Egypt I will execute judgment. I am the Lord.

It happened at midnight -- the Lord attacked all the firstborn in the land of Egypt, from the firstborn of Pharaoh who sat on his throne to the firstborn of the captive who was in the prison, and all the firstborn of the cattle.

"Set apart to me every firstborn male -- the first offspring of every womb among the Israelites, whether human or animal; it is mine."

Every firstling of a donkey you must redeem with a lamb, and if you do not redeem it, then you must break its neck. Every firstborn of your sons you must redeem.

When Pharaoh stubbornly refused to release us, the Lord killed all the firstborn in the land of Egypt, from the firstborn of people to the firstborn of animals. That is why I am sacrificing to the Lord the first male offspring of every womb, but all my firstborn sons I redeem.'

"Do not hold back offerings from your granaries or your vats. You must give me the firstborn of your sons.

"Every firstborn of the womb belongs to me, even every firstborn of your cattle that is a male, whether ox or sheep.

Now the firstling of a donkey you may redeem with a lamb, but if you do not redeem it, then break its neck. You must redeem all the firstborn of your sons. "No one will appear before me empty-handed.