Romans 4:13

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.

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.

Romans 9:8

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.

Galatians 3:16-18

Now it was to Abraham that the promises were made, 'and to his offspring.' It was not said 'to his offsprings,' as if many persons were meant, but the words were 'to thy offspring,' showing that one person was meant--and that was Christ.

Treasury of Scripture Knowledge

Summary

For the promise, that he should be the heir of the world, was not to Abraham, or to his seed, through the law, but through the righteousness of faith.

Through the

But through

General references

Bible References

Through the

Galatians 3:16
Now it was to Abraham that the promises were made, 'and to his offspring.' It was not said 'to his offsprings,' as if many persons were meant, but the words were 'to thy offspring,' showing that one person was meant--and that was Christ.

But through

Romans 4:11
Not after, but before. And it was as a sign of this that he received the rite of circumcision-to attest the righteousness due to the faith of an uncircumcised man-in order that he might be the father of all who have faith in God even when uncircumcised, that they also may be regarded by God as righteous;

General references

Galatians 4:28
As for ourselves, brothers, we, like Isaac, are children born in fulfillment of a promise.