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:
The priest will make amends for all the people of Israel's group, and they will be forgiven because they didn't know. They must give an offering, a fire sacrifice to the Lord, along with their sin offering, also for their lack of knowledge.