Numbers 15:25
And the priest shall make an atonement for all the congregation of the children of Israel, and it shall be forgiven them; for it is ignorance: and they shall bring their offering, a sacrifice made by fire unto the Lord, and their sin offering before the Lord, for their ignorance:
Cross-references
Leviticus 4:20 is the parallel law for the congregation's unintentional sin — same atonement and forgiveness.
In Luke 23:34, Jesus prays forgiveness for those acting in ignorance, directly mirroring the OT provision for unintentional sin here.
Acts 13:39 contrasts the law's inability to fully justify with Christ's freedom, highlighting the limitation of the OT atonement here.
Romans 3:25 presents Christ as the ultimate propitiation — the atonement here foreshadows His sacrifice.
In 1 John 2:2, Christ is the propitiation for the whole world, fulfilling the OT atonement for unintentional sins seen here.
Leviticus 4:35 also concludes with atonement and forgiveness for unintentional sin, closely matching the pattern and language here.
Isaiah 22:14 declares that some iniquity will not be atoned for until death, contrasting the available atonement here for unintentional sins.