'First born' in the Bible

The descendants of Reuben, the firstborn of Israel: according to their family records by their clans and their ancestral houses, counting one by one the names of every male 20 years old or more, everyone who could serve in the army,

These are the names of Aaron’s sons: Nadab, the firstborn, and Abihu, Eleazar, and Ithamar.

“See, I have taken the Levites from the Israelites in place of every firstborn Israelite from the womb. The Levites belong to Me,

because every firstborn belongs to Me. At the time I struck down every firstborn in the land of Egypt, I consecrated every firstborn in Israel to Myself, both man and animal. They are Mine; I am Yahweh.”

The Lord told Moses: “Register every firstborn male of the Israelites one month old or more, and list their names.

You are to take the Levites for Me—I am Yahweh—in place of every firstborn among the Israelites, and the Levites’ cattle in place of every firstborn among the Israelites’ cattle.”

So Moses registered every firstborn among the Israelites, as the Lord commanded him.

The total number of the firstborn males one month old or more listed by name was 22,273.

“Take the Levites in place of every firstborn among the Israelites, and the Levites’ cattle in place of their cattle. The Levites belong to Me; I am Yahweh.

As the redemption price for the 273 firstborn Israelites who outnumber the Levites,

He collected the money from the firstborn Israelites: 1,365 shekels measured by the standard sanctuary shekel.

For they have been exclusively assigned to Me from the Israelites. I have taken them for Myself in place of all who come first from the womb, every Israelite firstborn.

For every firstborn among the Israelites is Mine, both man and animal. I consecrated them to Myself on the day I struck down every firstborn in the land of Egypt.

But I have taken the Levites in place of every firstborn among the Israelites.

The firstborn of every living thing, man or animal, presented to the Lord belongs to you. But you must certainly redeem the firstborn of man, and redeem the firstborn of an unclean animal.

“However, you must not redeem the firstborn of an ox, a sheep, or a goat; they are holy. You are to sprinkle their blood on the altar and burn their fat as a fire offering for a pleasing aroma to the Lord.

Reuben was the firstborn of Israel.Reuben’s descendants:the Hanochite clan from Hanoch;the Palluite clan from Pallu;

Meanwhile, the Egyptians were burying every firstborn male the Lord had struck down among them, for the Lord had executed judgment against their gods.