Jeremiah 34:12

וַיִּשְׁמְעוּ כָל־הַשָּׂרִים וְכָל־הָעָם אֲשֶׁר־בָּאוּ בַבְּרִית לְשַׁלַּח אִישׁ אֶת־עַבְדּוֹ וְאִישׁ אֶת־שִׁפְחָתוֹ חָפְשִׁים לְבִלְתִּי עֲבָד־בָּם עוֹד וַֽיִּשְׁמְעוּ 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;

וַיָּשׁוּבוּ אַחֲרֵי־כֵן וַיָּשִׁבוּ אֶת־הָֽעֲבָדִים וְאֶת־הַשְּׁפָחוֹת אֲשֶׁר שִׁלְּחוּ חָפְשִׁים ויכבישום לַעֲבָדִים וְלִשְׁפָחֽוֹת

but afterwards they turned, and caused the servants and the handmaids, whom they had let go free, to return, and brought them into subjection for servants and for handmaids;

כֹּֽה־אָמַר יְהוָה אֱלֹהֵי יִשְׂרָאֵל אָנֹכִי כָּרַתִּֽי בְרִית אֶת־אֲבוֹתֵיכֶם בְּיוֹם הוֹצִאִי אוֹתָם מֵאֶרֶץ מִצְרַיִם מִבֵּית עֲבָדִים לֵאמֹֽר

Thus saith the LORD, the God of Israel: I made a covenant with your fathers in the day that I brought them forth out of the land of Egypt, out of the house of bondage, saying:

מִקֵּץ שֶׁבַע שָׁנִים תְּֽשַׁלְּחוּ אִישׁ אֶת־אָחִיו הָעִבְרִי אֲשֶֽׁר־יִמָּכֵר לְךָ וַעֲבָֽדְךָ שֵׁשׁ שָׁנִים וְשִׁלַּחְתּוֹ חָפְשִׁי מֵֽעִמָּךְ וְלֹֽא־שָׁמְעוּ אֲבֽוֹתֵיכֶם אֵלַי וְלֹא הִטּוּ אֶת־אָזְנָֽם

’At the end of seven years ye shall let go every man his brother that is a Hebrew, that hath been sold unto thee, and hath served thee six years, thou shalt let him go free from thee’; but your fathers hearkened not unto Me, neither inclined their ear.