Biblion Bible Commentary
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The Levites Taken Instead of the Firstborn
Numbers 3:1-4:49
1 Now this is the history of the generations of Aaron and Moses in the day that Yahweh spoke with Moses in Mount Sinai. · WEB
One tribe is accepted in place of every firstborn son in Israel, and the surplus is counted and paid for.
The chapter opens by naming Aaron's four sons and immediately recording that two of them are dead — Nadab and Abihu died before Yahweh when they offered strange fire Numbers 3:4. The priesthood begins the book at half strength.
Then the substitution that gives the Levites their standing.
I have taken the Levites from among the children of Israel instead of all the firstborn who open the womb... and the Levites shall be mine Numbers 3:12.
The claim behind it is stated in the next verse and it reaches back to Egypt: on the day that I struck down all the firstborn in the land of Egypt I made holy to me all the firstborn in Israel Numbers 3:13. Every eldest son in Israel had been spared on a night when the eldest sons of Egypt were not, and God's claim on them dates from then.
So one tribe stands in for a claim on every household in the country. The firstborn go free and the Levites are taken.
What follows is the arithmetic, and it is the reason this passage repays attention. The Levites are counted — twenty-two thousand — and the firstborn are counted separately at twenty-two thousand two hundred seventy-three Numbers 3:39 Numbers 3:43.
The substitution does not balance. Two hundred seventy-three firstborn have no Levite to stand for them, and they are redeemed at five shekels each, paid to the priests Numbers 3:46–48.
Nobody is left over. The count is done honestly, the shortfall is named, and provision is made for it rather than rounded away.
Chapter 4 then assigns the carrying. The sons of Kohath take the holy furniture, and the priests must wrap every item before they arrive, they shall not touch the sanctuary, lest they die Numbers 4:15. Gershon takes the curtains, Merari the frames and pillars.
The age of service is thirty to fifty Numbers 4:3, and the work is described as the burden — literally a load to be lifted. The most sacred duty in Israel is portering, and it has a retirement age.
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