Romans 4:10-11

How did he receive this gift of righteousness? Was he circumcised at the time God accepted him, or was he still uncircumcised? Clearly, he was an uncircumcised gentile when God said this of him! It was later that he received the external sign of circumcision as a seal to confirm that God had already transferred his righteousness to him by faith, while he was still uncircumcised. So now this qualifies him to become the father of all who believe among the non-Jewish people. And like their “father of faith,” Abraham, God also transfers his righteousness to them by faith.