Numbers 31:24 KJV
And ye shall wash your clothes on the seventh day, and ye shall be clean, and afterward ye shall come into the camp.
Numbers 31:24, King James Version
In 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,