Numbers 31:22-24

New Revised Standard Version, Anglicised

²² gold, silver, bronze, iron, tin, and lead— ²³ everything that can withstand fire, shall be passed through fire, and it shall be clean. Nevertheless it shall also be purified with the water for purification; and whatever cannot withstand fire, shall be passed through the water. ²⁴ You must wash your clothes on the seventh day, and you shall be clean; afterwards you may come into the camp.’