Numbers 3:47-49

American Standard Version

⁴⁷ thou shalt 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 redeemed, unto Aaron and to his sons. ⁴⁹ And Moses took the redemption-money from them that were over and above them that were redeemed by the Levites;