Acts 26:15

And I said, Who art thou, Lord? He replied, I am Jesus, whom you persecute.

Matthew 25:40

And the King will answer and say to them: Verily I say to you, Inasmuch as you did it to one of the least of these my brethren, you did it to me.

Matthew 25:45

Then will he answer them, saying: Verily I say to you, Inasmuch as you did it not to one of the least of these, you did it not to me.

John 15:20-21

Remember the word which I spoke to you, The servant is not greater than his master. If they have persecuted me, they will also persecute you; if they have kept my word, they will keep yours also.

Treasury of Scripture Knowledge

Summary

And I said, Who art thou, Lord? And he said, I am Jesus whom thou persecutest.

Bible References

I am

Matthew 25:40
And the King will answer and say to them: Verily I say to you, Inasmuch as you did it to one of the least of these my brethren, you did it to me.
John 15:20
Remember the word which I spoke to you, The servant is not greater than his master. If they have persecuted me, they will also persecute you; if they have kept my word, they will keep yours also.