Jeremiah 34:10 in the King James Version
Now when all the princes, and all the people, which had entered into the covenant, heard that every one should let his manservant, and every one his maidservant, go free, that none should serve themselves of them any more, then they obeyed, and let them go.
Context
9 that every man should let his male servant, and every man his female servant, who is a Hebrew or a Hebrewess, go free, that no one should make bondservants of them, of a Jew his brother.
10 All the princes and all the people obeyed who had entered into the covenant, that everyone should let his male servant and everyone his female servant go free, that no one should make bondservants of them any more. They obeyed and let them go,
11 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.