Numbers 15:26 Kabbalah

וְנִסְלַ֗ח לְכָל־עֲדַת֙ בְּנֵ֣י יִשְׂרָאֵ֔ל וְלַגֵּ֖ר הַגָּ֣ר בְּתוֹכָ֑ם כִּ֥י לְכָל־הָעָ֖ם בִּשְׁגָגָֽה׃ (ס)

And all the congregation of the children of Israel shall be forgiven, and the stranger that sojourneth among them; for in respect of all the people it was done in error.

Read kabbalistic (mystical) interpretation of Numbers 15:26: and classical mystical sources.