Leviticus 14:47-49

Amplified Bible

⁴⁷ And whoever lies down in the house [to rest] shall wash his clothes, and whoever eats in the house shall wash his clothes.

⁴⁸ “But if the priest comes in and inspects it and the mark has not spread in the house after the house has been replastered, he shall pronounce the house clean because the mark has not reappeared. ⁴⁹ To cleanse the house then, he shall take two birds and cedar wood and scarlet string and hyssop;