Leviticus 14:48-53

48“But if the priest comes to examine it and the mold has not spread after the house has been plastered, he shall pronounce the house clean, because the defiling mold is gone. 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. 52He shall purify the house with the bird’s blood, the fresh water, the live bird, the cedar wood, the hyssop and the scarlet yarn.

53Then he is to release the live bird in the open fields outside the town. In this way he will make atonement for the house, and it will be clean.”