וַיֹּאמְר֣וּ נָשִׁ֗יב וּמֵהֶם֙ לֹ֣א נְבַקֵּ֔שׁ כֵּ֣ן נַעֲשֶׂ֔ה כַּאֲשֶׁ֖ר אַתָּ֣ה אוֹמֵ֑ר וָאֶקְרָא֙ אֶת־הַכֹּ֣הֲנִ֔ים וָֽאַשְׁבִּיעֵ֔ם לַעֲשׂ֖וֹת כַּדָּבָ֥ר הַזֶּֽה׃
Then said they: ‘We will restore them, and will require nothing of them; so will we do, even as thou sayest.’ Then I called the priests, and took an oath of them, that they should do according to this promise.
Read midrashic interpretation of Nehemiah 5:12: and classical rabbinic exegesis.