Romans 3:25

whom God hath appointed to be a propitiation, through faith in his blood, for a demonstration of his righteousness, in the remission of past sins, according to the forbearance of God;

Luke 23:34

And Jesus said, Father, forgive them; for they know not what they do. And they parted his garments, and cast lots for them.

Acts 13:39

and by Him every one that believeth is justified from all things, from which ye could not be justified by the law of Moses.

Hebrews 2:17

Whence it behoved Him to be made in all things like unto his brethren, that He might be a merciful and faithful high-priest in the things concerning God, to make atonement for the sins of the people:

1 John 2:2

And He is the propitiation for our sins; and not for ours only, but also for the sins of the whole world.

Treasury of Scripture Knowledge

Summary

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

Forgiven them

Bible References

The priest

Romans 3:25
whom God hath appointed to be a propitiation, through faith in his blood, for a demonstration of his righteousness, in the remission of past sins, according to the forbearance of God;
1 John 2:2
And He is the propitiation for our sins; and not for ours only, but also for the sins of the whole world.

Forgiven them

Luke 23:34
And Jesus said, Father, forgive them; for they know not what they do. And they parted his garments, and cast lots for them.
Acts 13:39
and by Him every one that believeth is justified from all things, from which ye could not be justified by the law of Moses.