Leviticus 13:45-46 (ESV)
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.’ He shall remain unclean as long as he has the disease. He is unclean. He shall live alone. His dwelling shall be outside the camp.
Mark 1:40 (ESV)
And a leper came to him, imploring him, and kneeling said to him, “If you will, you can make me clean.”