Leviticus 14:8-9 - The Seven Days Of Purification
8 You must wash your clothes, shave off all your hair, and take a bath. You will then be ritually clean. You may enter the camp. You must live outside your tent for seven days. 9 On the seventh day you should again shave your head, your beard, your eyebrows, and all the rest of the hair on your body. You should wash your clothes and take a bath. Then you will be ritually clean.