While Saul was traveling to Damascus, Jesus appeared to him and blinded him.

Acts 9:3-8

3 Saul took those letters, and while he and those with him traveled toward Damascus, as they were approaching the city, suddenly a brilliant light from heaven shone around Saul. 4 Immediately he fell down to the ground. Then he heard the voice of the Lord say to him, “Saul, Saul, ◄stop causing me to suffer!/why are you causing me to suffer?► [RHQ]” 5 Saul asked him, “Lord, who are you?” He replied, “I am Jesus, and you (sg) are causing me to suffer by hurting my followers! 6 Now instead of continuing to do that, stand up and go into the city! Someone there will tell you (sg) what I want you to do.” 7 The men who were traveling with Saul became so frightened that they could not say anything. They just stood there. They only heard the sound when the Lord spoke, but they did not see anyone. 8 Saul got up from the ground, but when he opened his eyes he could not see anything. So the men with him took him by the hand and led him into Damascus. 9 For the next three days Saul could not see anything, and he did not eat or drink anything.