1 Corinthians 15:9

For I am the least of the apostles, who am not fit to be called apostle, because I have persecuted the assembly of God.

Acts 8:3

But Saul ravaged the assembly, entering into the houses one after another, and dragging off both men and women delivered them up to prison.

2 Corinthians 12:11

I have become a fool; ye have compelled me; for I ought to have been commended by you; for I have been nothing behind those who were in surpassing degree apostles, if also I am nothing.

Ephesians 3:7-8

of which I am become minister according to the gift of the grace of God given to me, according to the working of his power.

1 Timothy 1:13-15

who before was a blasphemer and persecutor, and an insolent overbearing man: but mercy was shewn me because I did it ignorantly, in unbelief.

Acts 9:1-19

But Saul, still breathing out threatenings and slaughter against the disciples of the Lord, came to the high priest

Acts 22:4-5

who have persecuted this way unto death, binding and delivering up to prisons both men and women;

Acts 26:9-11

I indeed myself thought that I ought to do much against the name of Jesus the Nazaraean.

2 Corinthians 11:5

For I reckon that in nothing I am behind those who are in surpassing degree apostles.

Galatians 1:13

For ye have heard what was my conversation formerly in Judaism, that I excessively persecuted the assembly of God, and ravaged it;

Galatians 1:23

only they were hearing that he who persecuted us formerly now announces the glad tidings of the faith which formerly he ravaged:

Philippians 3:6

as to zeal, persecuting the assembly; as to righteousness which is in the law, found blameless;

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 ravaged the assembly, entering into the houses one after another, and dragging off both men and women delivered them up to prison.
Acts 9:1
But Saul, still breathing out threatenings and slaughter against the disciples of the Lord, came to the high priest
Acts 22:4
who have persecuted this way unto death, binding and delivering up to prisons both men and women;
Acts 26:9
I indeed myself thought that I ought to do much against the name of Jesus the Nazaraean.
Galatians 1:13
For ye have heard what was my conversation formerly in Judaism, that I excessively persecuted the assembly of God, and ravaged it;
Philippians 3:6
as to zeal, persecuting the assembly; as to righteousness which is in the law, found blameless;
1 Timothy 1:13
who before was a blasphemer and persecutor, and an insolent overbearing man: but mercy was shewn me because I did it ignorantly, in unbelief.

General references

Luke 17:10
Thus ye also, when ye shall have done all things that have been ordered you, say, We are unprofitable bondmen; we have done what it was our duty to do.
Acts 8:3
But Saul ravaged the assembly, entering into the houses one after another, and dragging off both men and women delivered them up to prison.