Romans 4:11-12

MKJV(i) 11 And he received a sign of circumcision, a seal of the righteousness of the faith while still uncircumcised; so that he might be the father of all those believing through uncircumcision, for righteousness to be imputed to them also; 12 and a father of circumcision to those not of the circumcision only, but also to those walking by the steps of the faith of our father Abraham during uncircumcision.