וְאִם־נֶ֥פֶשׁ אַחַ֖ת תֶּחֱטָ֣א בִשְׁגָגָ֑ה וְהִקְרִ֛יבָה עֵ֥ז בַּת־שְׁנָתָ֖הּ לְחַטָּֽאת׃
And if one person sin through error, then he shall offer a she-goat of the first year for a sin-offering.
Read kabbalistic (mystical) interpretation of Numbers 15:27: and classical mystical sources.