Philippians 3:5-6 NLT

5 For I was circumcised when I was eight days old, having been born into a pure-blooded Jewish family that is a branch of the tribe of Benjamin. So I am a real Jew if there ever was one! What's more, I was a member of the Pharisees, who demand the strictest obedience to the Jewish law.
6 And zealous? Yes, in fact, I harshly persecuted the church. And I obeyed the Jewish law so carefully that I was never accused of any fault.