Numbers 3:47-49

New Living Translation

⁴⁷ collect five pieces of silver^[a] for each of them (each piece weighing the same as the sanctuary shekel, which equals twenty gerahs). ⁴⁸ Give the silver to Aaron and his sons as the redemption price for the extra firstborn sons.”

⁴⁹ So Moses collected the silver for redeeming the firstborn sons of Israel who exceeded the number of Levites.