וַיָּ֣קָם עֶזְרָ֡א וַיַּשְׁבַּ֣ע אֶת־שָׂרֵי֩ הַכֹּהֲנִ֨ים הַלְוִיִּ֜ם וְכָל־יִשְׂרָאֵ֗ל לַעֲשׂ֛וֹת כַּדָּבָ֥ר הַזֶּ֖ה וַיִּשָּׁבֵֽעוּ׃
Then arose Ezra, and made the chiefs of the priests, the Levites, and all Israel, to swear that they would do according to this word. So they swore.
Read midrashic interpretation of Ezra 10:5: and classical rabbinic exegesis.