וַיִּשְׁמְעוּ֩ כָל־הַשָּׂרִ֨ים וְכָל־הָעָ֜ם אֲשֶׁר־בָּ֣אוּ בַבְּרִ֗ית לְ֠שַׁלַּח אִ֣ישׁ אֶת־עַבְדּ֞וֹ וְאִ֤ישׁ אֶת־שִׁפְחָתוֹ֙ חָפְשִׁ֔ים לְבִלְתִּ֥י עֲבָד־בָּ֖ם ע֑וֹד וַֽיִּשְׁמְע֖וּ וַיְשַׁלֵּֽחוּ׃
and all the princes and all the people hearkened, that had entered into the covenant to let every one his man-servant, and every one his maid-servant, go free, and not to make bondmen of them any more; they hearkened, and let them go;
Read Jewish philosophy on Jeremiah 34:10: Rambam's Guide for the Perplexed, Saadia Gaon, and classical Jewish philosophical sources, free online.