4:27 hath many more children. This quotation is from Isaiah 54:1. In the prophetic context it is a prophecy of the future restoration of Israel and Jerusalem when “the Jerusalem which is above” will actually come to earth as “the holy city, New Jerusalem” (Revelation 21:2). In the allegorical context, the barren woman represents Sarah, who in turn represents and begets all the children of promise who are the spiritual heirs of Abraham (Galatians 3:29).