Hebrews 11:12
Thus a single man, though he was physically impotent, had issue in number like the stars in heaven, countless as the sand on the seashore.
Romans 4:18
For Abraham, when hope was gone, hoped on in faith, and thus became the father of many nations ??even as he was told, So numberless shall your offspring be.
Romans 9:7-8
they are not all children of Abraham because they are descended from Abraham. No, it is through Isaac that your offspring shall be reckoned ??8 meaning that instead of God's children being the children born to him by natural descent, it is the children of the Promise who are reckoned as his true offspring.