Leviticus 14:8-9

8He who is to be cleansed shall wash his clothes, shave off all his hair, and wash himself in water, that he may be clean. After that he shall come into the camp, and shall stay outside his tent seven days.

9But on the seventh day he shall shave all the hair off his head and his beard and his eyebrows—all his hair he shall shave off. He shall wash his clothes and wash his body in water, and he shall be clean.