Galatians 4:28
Now, brothers, you [Christians] are children of the promise [made to Abraham. See 3:29] just like Isaac, [Abraham's son] was.
Galatians 3:29
And if you belong to Christ, then you are [truly] Abraham's seed [i.e., his spiritual descendants] and thereby [you will] inherit what was promised to him [i.e., God's blessings].
Galatians 4:23
Now the son [Ishmael], born to the slave woman, was born simply of their natural relationship; but the son [Isaac], born to the free woman, was born in fulfillment of a [divine] promise.
Romans 4:13-18
For it was not through [obedience to] law [See 3:31] that the promise to Abraham or his descendants of inheriting [the best of] the world [was made], but through their being considered righteous because of faith [in God].
Romans 9:8-9
This means that it is not the physical descendants [of Abraham] who are God's children, but it is the children [born] according to [God's] promise who are [Abraham's true] descendants.
Acts 3:25
You people are descendants of these prophets and [recipients] of the Agreement God made with your forefathers when He said to Abraham [Gen. 12:3], 'And through your seed [i.e., your descendant Jesus] all the people of the earth will receive the blessings [of God].'
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