Leviticus 14:49-51

49To purify the house he is to take two birds and some cedar wood, scarlet yarn and hyssop. 50He shall kill one of the birds over fresh water in a clay pot. 51Then he is to take the cedar wood, the hyssop, the scarlet yarn and the live bird, dip them into the blood of the dead bird and the fresh water, and sprinkle the house seven times.