Numbers 3:46-48

New Revised Standard Version, Anglicised Catholic Edition

⁴⁶ As the price of redemption of the two hundred and seventy-three of the firstborn of the Israelites, over and above the number of the Levites, ⁴⁷ you shall accept five shekels apiece, reckoning by the shekel of the sanctuary, a shekel of twenty gerahs. ⁴⁸ Give to Aaron and his sons the money by which the excess number of them is redeemed.