Leviticus 14:18

14:18 and the remainder of the olive oil that is in his hand the priest is to put on the head of the one being cleansed. So the priest is to make atonement for him before the Lord.

Leviticus 14:53

14:53 and he is to send the live bird away outside the city into the open countryside. So he is to make atonement for the house and it will be clean.