Jeremiah 34:9

American Standard Version (ASV):
that every man should let his man-servant, and every man his maid-servant, that is a Hebrew or a Hebrewess, go free; that none should make bondmen of them, [to wit], of a Jew his brother.

King James Version (KJV):
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.