Numbers 3:48

New Revised Standard Version Catholic Interconfessional

Give to Aaron and his sons the money by which the excess number of them is redeemed.

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you shall accept five shekels apiece, reckoning by the shekel of the sanctuary, a shekel of twenty gerahs.

So Moses took the redemption money from those who were over and above those redeemed by the Levites;

and Moses gave the redemption money to Aaron and his sons, according to the word of the Lord, as the Lord had commanded Moses.