Numbers 31:24 in the World English Bible
You shall wash your clothes on the seventh day, and you shall be clean. Afterward you shall come into the camp.”
Context
23 Every thing that may abide the fire, ye shall make it go through the fire, and it shall be clean: nevertheless it shall be purified with the water of separation: and all that abideth not the fire ye shall make 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 the LORD spake unto Moses, saying,