Numbers 31:25

everything that may withstand the fire, you 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 doesn't withstand the fire you shall make to go through the water.

You shall wash your clothes on the seventh day, and you shall be clean; and afterward you shall come into the camp.

Take the sum of the prey that was taken, both of man and of animal, you, and Eleazar the priest, and the heads of the fathers' [houses] of the congregation;

and divide the prey into two parts: between the men skilled in war, who went out to battle, and all the congregation.