Leviticus 13:44-46

44he is a leprous man, he is unclean. The priest must pronounce him unclean; his disease is on his head.

45"The leprous person who has the disease shall wear torn clothes and let the hair of his head hang loose, and he shall cover his upper lip and cry out, 'Unclean, unclean.'

46He shall remain unclean as long as he has the disease. He is unclean. He shall live alone. His dwelling shall be outside the camp.