Numbers 3:47-49

Authorized (King James) Version

⁴⁷ thou shalt even take five shekels apiece by the poll, after the shekel of the sanctuary shalt thou take them: (the shekel is twenty gerahs:) ⁴⁸ and thou shalt give the money, wherewith the odd number of them is to be redeemed, unto Aaron and to his sons. ⁴⁹ And Moses took the redemption money of them that were over and above them that were redeemed by the Levites: