Acts of the Apostles 9:20-22, 27

And immediately he began preaching about Jesus in the synagogues, saying, “He is indeed the Son of God!” All who heard him were amazed. “Isn’t this the same man who caused such devastation among Jesus’ followers in Jerusalem?” they asked. “And didn’t he come here to arrest them and take them in chains to the leading priests?” Saul’s preaching became more and more powerful, and the Jews in Damascus couldn’t refute his proofs that Jesus was indeed the Messiah.

Then Barnabas brought him to the apostles and told them how Saul had seen the Lord on the way to Damascus and how the Lord had spoken to Saul. He also told them that Saul had preached boldly in the name of Jesus in Damascus.