Numbers 31:23-25

Darby Translation

²³ everything that passeth through the fire, ye shall make it go through the fire, and it shall be clean; only it shall be purified with the water of separation; and everything that cannot pass through the fire ye shall make go through the water.

²⁴ And ye shall wash your garments on the seventh day, and ye shall be clean; and afterwards ye may come into the camp.

²⁵ And Jehovah spoke to Moses, saying,