Galatians 4:28
But you, brethren, like Isaac, are children born in fulfilment of a promise.
Galatians 3:29
And if you belong to Christ, then you are indeed true descendants of Abraham, and are heirs in fulfilment of the promise.
Galatians 4:23
But we see that the child of the slave-girl was born in the common course of nature; but the child of the free woman in fulfilment of the promise.
Romans 4:13-18
Again, the promise that he should inherit the world did not come to Abraham or his posterity conditioned by Law, but by faith-righteousness.
Romans 9:8-9
In other words, it is not the children by natural descent who count as God's children, but the children made such by the promise are regarded as Abraham's posterity.
Acts 3:25
"You are the heirs of the Prophets, and of the Covenant which God made with your forefathers when He said to Abraham, 'And through your posterity all the families of the world shall be blessed.'
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