וַיִּבָּֽדְלוּ֙ זֶ֣רַע יִשְׂרָאֵ֔ל מִכֹּ֖ל בְּנֵ֣י נֵכָ֑ר וַיַּעַמְד֗וּ וַיִּתְוַדּוּ֙ עַל־חַטֹּ֣אתֵיהֶ֔ם וַעֲוֺנ֖וֹת אֲבֹתֵיהֶֽם׃
And the seed of Israel separated themselves from all foreigners, and stood and confessed their sins, and the iniquities of their fathers.
Read kabbalistic (mystical) interpretation of Nehemiah 9:2: and classical mystical sources.