1 Corinthians 15:9

For I am the least of the Apostles, having no right to be named an Apostle, because of my cruel attacks on the church of God.

Acts 8:3

But Saul was burning with hate against the church, going into every house and taking men and women and putting them in prison.

2 Corinthians 12:11

I have been forced by you to become foolish, though it was right for my praise to have come from you: for in no way was I less than the chief of the Apostles, though I am nothing.

Ephesians 3:7-8

Of which I was made a preacher, through that grace of God which was given to me in the measure of the working of his power.

1 Timothy 1:13-15

Though I had said violent words against God, and done cruel acts, causing great trouble: but I was given mercy, because I did it without knowledge, not having faith;

Acts 9:1-19

But Saul, still burning with desire to put to death the disciples of the Lord, went to the high priest,

Acts 22:4-5

And I made attacks on this Way, even to death, taking men and women and putting them in prison.

Acts 26:9-11

For I, truly, was of the opinion that it was right for me to do a number of things against the name of Jesus of Nazareth.

2 Corinthians 11:5

For in my opinion, I am in no way less than the most important of the Apostles.

Galatians 1:13

For news has come to you of my way of life in the past in the Jews' religion, how I was cruel without measure to the church of God, and did great damage to it:

Galatians 1:23

Only it came to their ears that he who at one time was cruel to us is now preaching the faith which before had been attacked by him;

Philippians 3:6

In bitter hate I was cruel to the church; I kept all the righteousness of the law to the last detail.

Treasury of Scripture Knowledge

Summary

For I am the least of the apostles, that am not meet to be called an apostle, because I persecuted the church of God.

General references

Bible References

Because

Acts 8:3
But Saul was burning with hate against the church, going into every house and taking men and women and putting them in prison.
Acts 9:1
But Saul, still burning with desire to put to death the disciples of the Lord, went to the high priest,
Acts 22:4
And I made attacks on this Way, even to death, taking men and women and putting them in prison.
Acts 26:9
For I, truly, was of the opinion that it was right for me to do a number of things against the name of Jesus of Nazareth.
Galatians 1:13
For news has come to you of my way of life in the past in the Jews' religion, how I was cruel without measure to the church of God, and did great damage to it:
Philippians 3:6
In bitter hate I was cruel to the church; I kept all the righteousness of the law to the last detail.
1 Timothy 1:13
Though I had said violent words against God, and done cruel acts, causing great trouble: but I was given mercy, because I did it without knowledge, not having faith;

General references

Luke 17:10
In the same way, when you have done all the things which are given you to do, say, There is no profit in us, for we have only done what we were ordered to do.
Acts 8:3
But Saul was burning with hate against the church, going into every house and taking men and women and putting them in prison.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain