Leviticus 14:13-14

13Next he shall slaughter the male lamb in 1the place where they slaughter the sin offering and the burnt offering, at the place of the sanctuary--for the guilt offering, 2like the sin offering, belongs to the priest; it is most holy.

14The priest shall then take some of the blood of the 3guilt offering, and the priest shall put it on 4the lobe of the right ear of the one to be cleansed, and on the thumb of his right hand and on the big toe of his right foot.