"Who are you, Lord?" Saul asked. "I am Jesus, whom you are persecuting," he replied. (NIV)
And Saul said, Who are You, Lord? And He said, I am Jesus, Whom you are persecuting. It is dangerous and it will turn out badly for you to keep kicking against the goad [to offer vain and perilous resistance]. (AMP)
And he said, Who art thou, Lord? And the Lord said, I am Jesus whom thou persecutest: it is hard for thee to kick against the pricks. (KJV)