Jeremiah 34:8-9

MLV(i) 8 The word that came to Jeremiah from Jehovah, after the king Zedekiah had made a covenant with all the people who were at Jerusalem, to proclaim liberty to them, 9 that every man should let his man-servant and every man his maid-servant, who is a Hebrew man or a Hebrew woman, go free, that none should make bondmen of them, namely, of a Jew his brother.