Galatians 4:28
As for ourselves, brothers, we, like Isaac, are children born in fulfillment of a promise.
Galatians 3:29
And, since you belong to Christ, it follows that you are Abraham's offspring and, under the promise, sharers in the inheritance.
Galatians 4:23
But the child of the slave-woman was born in the course of nature, while the child of the free woman was born in fulfillment of a promise.
Romans 4:13-18
For the promise that he should inherit the world did not come to Abraham or his descendants through Law, but through the righteousness due to faith.
Romans 9:8-9
This means that it is not the children born in the course of nature who are God's Children, but it is the children born in fulfillment of the Promise who are to be regarded as Abraham's descendants.
Acts 3:25
You yourselves are the heirs of the Prophets, and heirs, too, of the Covenant which God made with your ancestors, when he said to Abraham--'In your descendants will all the nations of the earth be blessed.'
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