Leviticus 14:24

and two turtledoves, or two young pigeons, such as he is able to afford; and the one shall be a sin offering, and the other a burnt offering.

On the eighth day he shall bring them for his cleansing to the priest, to the door of the Tent of Meeting, before Yahweh.

He shall kill the lamb of the trespass offering. The priest shall take some of the blood of the trespass offering and put it on the tip 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.

The priest shall pour some of the oil into the palm of his own left hand;