28 Now you, brothers, like Isaac, are children of promise.
Galatians 4:28 Cross References - BLB
Acts 3:25
25 You are the sons of the prophets and of the covenant that God made with your fathers, saying to Abraham, ‘And in your seed all the families of the earth will be blessed.’
Romans 4:13-18
13 For the promise was to Abraham or his descendants that he should be heir of the world, not through the Law, but through the righteousness of faith.
14 For if those of the Law are heirs, faith has been made void and the promise made of no effect.
15 For Law brings wrath; and where there is no Law, neither is transgression.
16 Therefore it is of faith, that it may be according to grace, for the promise to be sure to all the seed, not only to that of the Law, but also to that of the faith of Abraham, who is the father of us of all—
17 as it has been written: “I have made you a father of many nations.”—before God whom he believed, the One giving life to the dead and calling into being the things not even existing,
18 who against hope, in hope believed, for him to become the father of many nations, according to that having been spoken, “So shall your offspring be.”
Romans 9:8-9
Galatians 3:29
29 Now if you are of Christ, then you are Abraham’s seed, heirs according to the promise.
Galatians 4:23
23 But indeed, the one of the slave woman has been born according to flesh, but the one of the free, through the promise,