Leviticus 14:49

47He who lies down in the house shall wash his clothes; and he who eats in the house shall wash his clothes.

48“If the priest shall come in, and examine it, and behold, the plague hasn’t spread in the house, after the house was plastered, then the priest shall pronounce the house clean, because the plague is healed.

49To cleanse the house he shall take two birds, cedar wood, scarlet, and hyssop.

50He shall kill one of the birds in an earthen vessel over running water.

51He shall take the cedar wood, the hyssop, the scarlet, and the living bird, and dip them in the blood of the slain bird, and in the running water, and sprinkle the house seven times.