Galatians 4:25-31

Now Hagar is (represents) Mount Sinai in Arabia and she corresponds to the present Jerusalem, for she is in slavery with her children. But the Jerusalem above [that is, the way of faith, represented by Sarah] is free; she is our mother. For it is written [in the Scriptures], “REJOICE, O BARREN WOMAN WHO HAS NOT GIVEN BIRTH; BREAK FORTH INTO A [joyful] SHOUT, YOU WHO ARE NOT IN LABOR; FOR THE DESOLATE WOMAN HAS MANY MORE CHILDREN THAN SHE WHO HAS A HUSBAND.” [Is 54:1] And we, [believing] brothers and sisters, like Isaac, are children [not merely of physical descent, like Ishmael, but are children born] of promise [born miraculously]. But as at that time the child [of ordinary birth] born according to the flesh persecuted the son who was born according to [the promise and working of] the Spirit, so it is now also. [Gen 21:9] But what does the Scripture say? “CAST OUT THE BONDWOMAN [Hagar] AND HER SON [Ishmael], FOR NEVER SHALL THE SON OF THE BONDWOMAN BE HEIR and SHARE THE INHERITANCE WITH THE SON OF THE FREE WOMAN.” [Gen 21:10] So then, believers, we [who are born again—reborn from above—spiritually transformed, renewed, and set apart for His purpose] are not children of a slave woman [the natural], but of the free woman [the supernatural].