Thematic Bible: Mode of purifying, taken in war

Then Eleazar the priest said to the men of war who had been to the fight, This is the rule of the law which the Lord has given to Moses: But gold and silver and brass and iron and tin and lead, And anything which may be heated, is to go through the fire and be made clean; but in addition it is to be put in the water of cleaning: and anything which may not go through the fire is to be put in the water.