Romans 4
11 Ref And he was given the sign of circumcision as a witness of the faith which he had before he underwent circumcision: so that he might be the father of all those who have faith, though they have not circumcision, and so that righteousness might be put to their account;
12 Ref And the father of circumcision to those who not only are of the circumcision, but who keep to the way of that faith which our father Abraham had before he underwent circumcision.
13 Ref For God's word, that the earth would be his heritage, was given to Abraham, not through the law, but through the righteousness of faith.