Leviticus 13:44-46

44he is a leprous man; he is unclean; the priest shall most certainly pronounce him unclean; his disease is on his head.

45“As for the leper who has the infection, his clothes shall be torn, and the hair of his head shall be uncovered (disheveled), and he shall cover his mustache and call out, ‘Unclean! Unclean!’

46He shall remain [ceremonially] unclean as long as the disease is on him; he is unclean. He shall live alone; he shall live outside the camp.