Leviticus 14:47-50
English Standard Version
48"But if the priest comes and looks, and if the disease has not spread in the house after the house was plastered, then the priest shall pronounce the house clean, for the disease is healed.
49And for the cleansing of the house he shall take two small birds, with cedarwood and scarlet yarn and hyssop,
50and shall kill one of the birds in an earthenware vessel over fresh water
