Leviticus 14:4-7

4then the priest will command that two live clean birds, a piece of cedar wood, a scrap of crimson fabric, and some twigs of hyssop be taken up for the one being cleansed.

5The priest will then command that one bird be slaughtered into a clay vessel over fresh water.

6Then he is to take the live bird along with the piece of cedar wood, the scrap of crimson fabric, and the twigs of hyssop, and he is to dip them and the live bird in the blood of the bird slaughtered over the fresh water,

7and sprinkle it seven times on the one being cleansed from the disease, pronounce him clean, and send the live bird away over the open countryside.