Leviticus 14:26-31

²⁶Then the priest will pour some of the oil into the palm of his left hand,

²⁷and with his right forefinger he must sprinkle some of the oil from his palm there in my presence.

²⁸He must put some of the oil in his palm on the same places where he put the blood.

²⁹He must put the rest of the oil that is in his hand on the head of the person who has been healed of a skin disease, to indicate that I have forgiven him for having sinned.

³⁰Then the priest must sacrifice the doves or the pigeons, whichever that person has brought.

³¹One will be an offering for sin and the other will be completely burned on the altar, along with the offering of grain. By doing that, the priest will declare that the person is no longer guilty for having sinned.