Acts 9:3-6

9:3 As he was going along, approaching Damascus, suddenly a light from heaven flashed around him. 9:4 He fell to the ground and heard a voice saying to him, “Saul, Saul, why are you persecuting me?” 9:5 So he said, “Who are you, Lord?” He replied, “I am Jesus whom you are persecuting! 9:6 But stand up and enter the city and you will be told what you must do.”

Acts 9:15

9:15 But the Lord said to him, “Go, because this man is my chosen instrument to carry my name before Gentiles and kings and the people of Israel.