Leviticus 14:13-14

13And he shall slaughter the he-lamb at the place where the sin-offering and the burnt-offering are slaughtered, in a holy place; for as the sin-offering, so the trespass-offering is the priest's: it is most holy.

14And the priest shall take of the blood of the trespass-offering, and the priest shall put it on the tip of the right ear of him that is to be cleansed, and on the thumb of his right hand, and on the great toe of his right foot.