Numbers 31:23 in the King James Version
Every thing that may abide the fire, ye shall make it go through the fire, and it shall be clean: nevertheless it shall be purified with the water of separation: and all that abideth not the fire ye shall make go through the water.
Context
22 However the gold, and the silver, the bronze, the iron, the tin, and the lead,
23 everything that may withstand the fire, you shall make to go through the fire, and it shall be clean; nevertheless it shall be purified with the water for impurity. All that doesn’t withstand the fire you shall make to go through the water.
24 You shall wash your clothes on the seventh day, and you shall be clean. Afterward you shall come into the camp.”