Numbers 3 explained: The Levites Take the Firstborn's Place

Aaron's priestly sons (vv. 1-4)

Aaron's four sons were anointed with oil to serve as priests, but Nadab and Abihu died after offering fire God had not commanded (the story is told in Leviticus 10, and exactly what they did wrong is not fully clear). They had no sons, so the priesthood continued through Eleazar and Ithamar, who served under their father's oversight.

Levites assigned as helpers (vv. 5-10)

The whole tribe of Levi is handed over to assist Aaron's family in caring for the tent of meeting, the portable worship tent at the center of the camp. The Levites were helpers, not priests: only Aaron's family could serve as priests, and any outsider who came too near the holy place was to be put to death.

In place of the firstborn (vv. 11-13)

Every firstborn son already belonged to God, a claim tied to the night Egypt's firstborn died while Israel's were spared. Now the Levites stand in for those firstborn sons as the people set apart for God's service.

Counting the Levites (vv. 14-20)

The other tribes counted men from age twenty for the army, but Levite males were counted from one month old, because this count was about belonging to God rather than going to war. They are grouped under Levi's three sons: Gershon, Kohath and Merari.

Places and duties (vv. 21-39)

Each clan camped on one side of the tent and looked after one part of it: Gershon the curtains and coverings, Kohath the holiest objects such as the ark, and Merari the frames and posts, while Moses and the priests camped at the entrance on the east. The clan numbers add up to 22,300, not the 22,000 given in verse 39, which may be rounding or a copying error, though no one knows for sure.

Paying for the extra sons (vv. 40-51)

Israel's firstborn sons numbered 22,273, which was 273 more than the Levites, so each extra son was bought back with five shekels, a set weight of silver, paid to the priests, for 1,365 shekels in all. The Levites' livestock likewise stood in for Israel's firstborn animals.

Key verse: Numbers 3:12

Something to think about

What do you make of the idea that being spared or protected could create a real obligation to someone?