Numbers 31:21-23

Revised Standard Version Catholic Edition

²¹ And Elea′zar the priest said to the men of war who had gone to battle: “This is the statute of the law which the Lord has commanded Moses: ²² only the gold, the silver, the bronze, the iron, the tin, and the lead, ²³ everything that can stand the fire, you shall pass through the fire, and it shall be clean. Nevertheless it shall also be purified with the water of impurity; and whatever cannot stand the fire, you shall pass through the water.