Romans 2:28-29

After all, who is a real Jew, truly circumcised? It is not the man who is a Jew on the outside, whose circumcision is a physical thing. Rather, the real Jew is the person who is a Jew on the inside, that is, whose heart has been circumcised, and this is the work of God's Spirit, not of the written Law. Such a person receives praise from God, not from human beings.