Numbers 31:22-24

American Standard Version

²² howbeit the gold, and the silver, the brass, the iron, the tin, and the lead, ²³ everything that may abide the fire, ye shall make to go through the fire, and it shall be clean; nevertheless it shall be purified with the water for impurity: and all that abideth not the fire ye shall make to go through the water. ²⁴ And ye shall wash your clothes on the seventh day, and ye shall be clean; and afterward ye shall come into the camp.