Romans 4:9-12

⁹ “Is this blessing then on the circumcised, or on the uncircumcised also? For we say, “Faith was credited to Abraham as righteousness.” ¹⁰ How then was it credited? While he was circumcised, or uncircumcised? Not while circumcised, but while uncircumcised; ¹¹ and he received the sign of circumcision, a seal of the righteousness of the faith which he had while uncircumcised, so that he might be the father of all who believe without being circumcised, that righteousness might be credited to them, ¹² and the father of circumcision to those who not only are of the circumcision, but who also follow in the steps of the faith of our father Abraham which he had while uncircumcised.”

God’s gift of righteousness to Abraham was given before he was circumcised, apart from the law. Abraham simply had faith and was made righteous as a result. Circumcision and uncircumcision are ultimately pointless to God. What matters to Him is the new creation we become when we believe (see Galatians 6:15).

Father of all: Here we see the full extent of God’s promise to Abraham. Abraham is the father of all who believe in Jesus. Believers are Abraham’s offspring (see Galatians 3:7).