Romans 4:13; Romans 4:16

13 For the promise to Abraham and his offspring that he would be heir of the world did not come through the law but through the righteousness of faith.

16 That is why it depends on faith, in order that the promise may rest on grace and be guaranteed to all his offspring--not only to the adherent of the law but also to the one who shares the faith of Abraham, who is the father of us all,