Leviticus 14:6, 49-52

He is then to take the live bird and dip it, together with the cedar wood, the scarlet yarn and the hyssop, into the blood of the bird that was killed over the fresh water.

To purify the house he is to take two birds and some cedar wood, scarlet yarn and hyssop. He shall kill one of the birds over fresh water in a clay pot. Then 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. He shall purify the house with the bird’s blood, the fresh water, the live bird, the cedar wood, the hyssop and the scarlet yarn.