Numbers 3:47 WEB

⁴⁵  'Take the Levites instead of all the firstborn among the children of Israel, and the cattle of the Levites instead of their cattle; and the Levites shall be mine. I am Yahweh.

⁴⁶  For the redemption of the two hundred seventy-three of the firstborn of the children of Israel, who exceed the number of the Levites,

⁴⁷  you shall take five shekels apiece for each one; after the shekel of the sanctuary you shall take them (the shekel is twenty gerahs):

⁴⁸  and you shall give the money, with which the remainder of them is redeemed, to Aaron and to his sons.'

⁴⁹  Moses took the redemption money from those who exceeded the number of those who were redeemed by the Levites;