Leviticus 14:4

14:4 then 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.

Leviticus 14:6

14:6 Then 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,