Galatians 1:13

You have heard of my career and former manner of life in Judaism, how I used to hunt down and persecute the church of God extensively and [with fanatical zeal] tried [my best] to destroy it.

Acts 8:3

But Saul began ravaging the church [and assaulting believers]; entering house after house and dragging off men and women, putting them in prison.

Acts 9:21

All those who heard him continued to be amazed and said, “Is this not the man who in Jerusalem attacked those who called on this name [of Jesus], and had come here [to Damascus] for the express purpose of bringing them bound [with chains] before the chief priests?”

Acts 26:4-5

“So then, all the Jews know my manner of life from my youth up, which from the beginning was spent among my own nation [the Jewish people], and in Jerusalem.

Acts 8:1

Saul wholeheartedly approved of Stephen’s death.

And on that day a great and relentless persecution broke out against the church in Jerusalem; and the believers were all scattered throughout the regions of Judea and Samaria, except for the apostles.

Acts 9:1-2

Now Saul, still breathing threats and murder against the disciples of the Lord [and relentless in his search for believers], went to the high priest,

Acts 9:13-14

But Ananias answered, “Lord, I have heard from many people about this man, especially how much suffering and evil he has brought on Your saints (God’s people) at Jerusalem;

Acts 9:26

When he arrived in Jerusalem, he tried to join the disciples; but they were all afraid of him, not believing that he really was a disciple.

Acts 22:3-5

“I am a Jew, born in Tarsus of Cilicia, but brought up in this city, educated at the feet of Gamaliel according to the strictness of the law of our fathers, being ardent and passionate for God just as all of you are today.

Acts 26:9-11

“So then, I [once] thought to myself that it was my duty to do many things in opposition to the name of Jesus of Nazareth.

1 Corinthians 15:9

For I am the least [worthy] of the apostles, and not fit to be called an apostle, because I [at one time] fiercely oppressed and violently persecuted the church of God.

Philippians 3:6

as to my zeal [for Jewish tradition], a persecutor of the church; and as to righteousness [supposed right living] which [my fellow Jews believe] is in the Law, I proved myself blameless.

1 Timothy 1:13

even though I was formerly a blasphemer [of our Lord] and a persecutor [of His church] and a shameful and outrageous and violent aggressor [toward believers]. Yet I was shown mercy because I acted out of ignorance in unbelief.

Treasury of Scripture Knowledge

Summary

For ye have heard of my conversation in time past in the Jews' religion, how that beyond measure I persecuted the church of God, and wasted it:

General references

Bible References

How

Acts 8:1
Saul wholeheartedly approved of Stephen’s death.

And on that day a great and relentless persecution broke out against the church in Jerusalem; and the believers were all scattered throughout the regions of Judea and Samaria, except for the apostles.
Acts 9:1
Now Saul, still breathing threats and murder against the disciples of the Lord [and relentless in his search for believers], went to the high priest,
Acts 22:4
I persecuted and pursued the followers of this Way to the death, binding them with chains and putting [followers of Jesus] both men and women into prisons,
Acts 26:9
“So then, I [once] thought to myself that it was my duty to do many things in opposition to the name of Jesus of Nazareth.
1 Corinthians 15:9
For I am the least [worthy] of the apostles, and not fit to be called an apostle, because I [at one time] fiercely oppressed and violently persecuted the church of God.
Philippians 3:6
as to my zeal [for Jewish tradition], a persecutor of the church; and as to righteousness [supposed right living] which [my fellow Jews believe] is in the Law, I proved myself blameless.
1 Timothy 1:13
even though I was formerly a blasphemer [of our Lord] and a persecutor [of His church] and a shameful and outrageous and violent aggressor [toward believers]. Yet I was shown mercy because I acted out of ignorance in unbelief.

General references

Acts 8:3
But Saul began ravaging the church [and assaulting believers]; entering house after house and dragging off men and women, putting them in prison.