Php Philippians, chapter Epistle to the Philippians, chapter 3
Since I was circumcised properly and have a purely Hebrew ancestry, and since I kept the Jewish laws blamelessly, I could rely upon what I have done and who I am better than anyone else could, if it were beneficial for my salvation.
Philippians 3:4b-6
I was so zealous to make people obey those laws that I caused the people who believe in Christ to suffer because I thought they were trying to abolish those laws. Indeed, as far as my obeying those laws is concerned, no one could have accused me by saying that I had disobeyed any of those laws.Act 8:3