Acts 9:3-5

And as he went on his journey, it came to pass that he drew nigh to Damascus. And suddenly a light from heaven shined round about him.

And falling on the ground, he heard a voice saying to him: Saul, Saul, why persecutest thou me?

Who said: Who art thou, Lord? And he: I am Jesus whom thou persecutest. It is hard for thee to kick against the goad.