וְכִפֶּ֣ר הַכֹּהֵ֗ן עַל־הַנֶּ֧פֶשׁ הַשֹּׁגֶ֛גֶת בְּחֶטְאָ֥ה בִשְׁגָגָ֖ה לִפְנֵ֣י יְהוָ֑ה לְכַפֵּ֥ר עָלָ֖יו וְנִסְלַ֥ח לֽוֹ׃
And the priest shall make atonement for the soul that erreth, when he sinneth through error, before the LORD, to make atonement for him; and he shall be forgiven,
Read halakhic rulings (Jewish law) on Numbers 15:28: and classical halakhic sources.