Numbers 31:23 ASV

²¹  And Eleazar the priest said unto the men of war that went to the battle, This is the statute of the law which Jehovah hath commanded Moses:

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.

²⁵  And Jehovah spake unto Moses, saying,