LOLOL. Paul says no such thing. The only circumcision Paul is concerned with is the "heart." Circumcision of the flesh is not a "works". Legalism and works based faiths are empty and have no hope
You need to read carefully.
Philippians 3
No Confidence in the Flesh
1Further, my brothers and sisters, rejoice in the Lord! It is no trouble for me to write the same things to you again, and it is a safeguard for you.
2Watch out for those dogs, those evildoers, those mutilators of the flesh.
3For it is we who are the circumcision, we who serve God by his Spirit, who boast in Christ Jesus, and who put no confidence in the flesh—
4though I myself have reasons for such confidence.
If someone else thinks they have reasons to put confidence in the flesh, I have more:
5circumcised on the eighth day, of the people of Israel, of the tribe of Benjamin, a Hebrew of Hebrews; in regard to the law, a Pharisee;
6as for zeal, persecuting the church; as for righteousness based on the law, faultless.