Leviticus 14:19

The priest shall put some of the rest of the oil that is in his hand 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, upon the blood of the trespass offering.

The rest of the oil that is in the priest's hand he shall put on the head of him who is to be cleansed, and the priest shall make atonement for him before Yahweh.

and the priest shall offer the burnt offering and the meal offering on the altar. The priest shall make atonement for him, and he shall be clean.

If he is poor, and can't afford so much, then he shall take one male lamb for a trespass offering to be waved, to make atonement for him, and one tenth of an ephah of fine flour mingled with oil for a meal offering, and a log of oil;