Leviticus 14:13-14

13And he shall kill the lamb in the place where they kill the sin offering and the burnt offering, in the place of the sanctuary. For the guilt offering, like the sin offering, belongs to the priest; it is most holy.

14The priest shall take some of the blood of the guilt offering, and the priest shall put it on the lobe of the right ear of him who is to be cleansed and on the thumb of his right hand and on the big toe of his right foot.