Acts 26:15

And I said, 'Who art Thou, Lord?' And the Lord said, 'I am Jesus, Whom you are persecuting.

Matthew 25:40

"And, answering, the King will say to them, 'Verily I say to you, inasmuch as ye did it to one of My brethren, even the least, ye did it to Me.'

Matthew 25:45

"Then will He answer them, saying, 'Verily I say to you, inasmuch as ye did it not to one of these least, ye did it not to Me!'

John 15:20-21

Remember the word which I spake to you, 'A servant is not greater than his lord.' If they persecuted Me, they will also persecute you; if they 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, answering, the King will say to them, 'Verily I say to you, inasmuch as ye did it to one of My brethren, even the least, ye did it to Me.'
John 15:20
Remember the word which I spake to you, 'A servant is not greater than his lord.' If they persecuted Me, they will also persecute you; if they kept My word, they will keep yours also.