Completion Offering and Restoration to Purity
This is not speculative typology: Luke actually shows Jesus' family using Leviticus 12's reduced-cost offering.
Where this fits in the story: Leviticus 5's graduated offerings establish economic accommodation within sacrificial restoration.
Where Scripture takes it next: Luke 2:22–24 — certain direct legal reference. Luke records the two-bird offering prescribed by Leviticus 12:8 when a lamb cannot be afforded.
Evidence boundary: The two birds strongly imply the family used the lower-cost option; Luke does not separately state their income.