Galatians 4:23
but while the son of the slave-woman was born by the flesh, the son of the free-woman was born by the promise.
Hebrews 11:11
It was by faith that even Sara got strength to conceive, bearing a son when she was past the age for it ??because she considered she could rely on Him who gave the promise.
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.
Romans 4:18-21
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 10:8
No, what it does say is this: ??The word is close to you, in your very mouth and in your heart (that is, the word of faith which we preach).
Galatians 4:28-29
Now you are the children of the Promise, brothers, like Isaac;