Numbers 15:28
And the priest shall make an atonement for the soul that sinneth ignorantly, when he sinneth by ignorance before the Lord, to make an atonement for him; and it shall be forgiven him.
Cross-references
Leviticus 4:26
Parallel
In Leviticus 4:26, the priest makes atonement and forgiveness is granted — identical language to the atonement here.
Hebrews 10:26
Contrast
Hebrews 10:26 contrasts willful sin with no sacrifice, directly opposing the provision here for unintentional sin.