Romans 3:25 (WEB)
whom God sent to be an atoning sacrifice through faith in his blood, for a demonstration of his righteousness for the passing over of previous sins, in God's forbearance,
Romans 4:9 KJV
Cometh this blessedness then upon the circumcision only, or upon the uncircumcision also? for we say that faith was reckoned to Abraham for righteousness.
Romans 4:11, 11 And he received the sign of circumcision, a seal of the righteousness of the faith which he had while still uncircumcised, that he might be the father of all those who believe, though they are uncircumcised, that righteousness might be imputed to them also, - NKJV
He is the father of circumcision , not only to those who are of the circumcision , but who also walk in the steps of that faith of our father Abraham, which he had in uncircumcision.