Romans 1

Romans 1:1Paul, a servant of Jesus Christ, called to be an apostle, separated unto the gospel of God,
 

Phil. 3:4Though I might also have confidence in the flesh. If any other man thinketh that he hath whereof he might trust in the flesh, I more:
5Circumcised the eighth day, of the stock of Israel, of the tribe of Benjamin, an Hebrew of the Hebrews; as touching the law, a Pharisee;
6Concerning zeal, persecuting the church; touching the righteousness which is in the law, blameless.
7But what things were gain to me, those I counted loss for Christ.

Acts 22:3: I am verily a man which am a Jew, born in Tarsus, a city in Cilicia, yet brought up in this city at the feet of Gamaliel, and taught according to the perfect manner of the law of the fathers, and was zealous toward God, as ye all are this day.

Acts8.1And Saul was consenting unto his death. And at that time there was a great persecution against the church which was at Jerusalem;

Acts 9.4And he fell to the earth, and heard a voice saying unto him, Saul, Saul, why persecutest thou me? 
5And he said, Who art thou, Lord? And the Lord said, I am Jesus whom thou persecutest: it is hard for thee to kick against the pricks.