Leviticus 14:18
And the remnant of the oil that is in the priest’s hand he shall pour upon the head of him that is to be cleansed: and the priest shall make an atonement for him before the Lord.
Cross-reference
Leviticus 14:29
Parallel
In Leviticus 14:29, the identical oil ritual for the poor person's cleansing shows the same atonement procedure applied to different economic situations.
Leviticus 8:12
Parallel
Leviticus 8:12 pours oil on Aaron's head for consecration, paralleling the oil poured on the cleansed leper's head in verse 18.
2 Corinthians 1:21
Typology
2 Corinthians 1:21 speaks of God anointing believers in Christ—a NT spiritual fulfillment of the OT anointing ritual that symbolized consecration.
Exodus 29:7
Parallel
Exodus 29:7 prescribes anointing Aaron with oil on his head for priestly consecration—a similar ritual action but for a different purpose.