Philippians 3:3-7
3 For 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— 4 though I myself have reasons for such confidence.
If someone else thinks they have reasons to put confidence in the flesh, I have more: 5 circumcised 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; 6 as for zeal, persecuting the church; as for righteousness based on the law, faultless.
7 But whatever were gains to me I now consider loss for the sake of Christ.