Acts 26:15

'Who are you, Sir?' said I. 'I am Jesus,' the Lord said, 'whom you are persecuting.

Matthew 25:40

And the King will answer them, 'I solemnly say to you, every time you did a good deed to one of these most insignificant brothers of mine, you did a good deed to me.'

Matthew 25:45

Then He will answer, 'I solemnly say to you, every time you failed to do a good deed to one of these most insignificant people, you failed to do a good deed to me.'

John 15:20-21

Remember what I once told you: No slave is greater than his master. If they have persecuted me, they will persecute you too. If they have observed my teaching, they will observe yours too.

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 them, 'I solemnly say to you, every time you did a good deed to one of these most insignificant brothers of mine, you did a good deed to me.'
John 15:20
Remember what I once told you: No slave is greater than his master. If they have persecuted me, they will persecute you too. If they have observed my teaching, they will observe yours too.