Jeremiah 34:9

34:9 that every man should let his man-servant, and every man his maid-servant, who is a Hebrew or a Hebrewess, go free; that none should make bondservants of them, [to wit], of a Jew his brother.
-World English Bible

Other Translation

34:9 That every man should let his manservant, and every man his maidservant, [being] an Hebrew or an Hebrewess, go free; that none should serve himself of them, [to wit], of a Jew his brother.
-King James Version