Acts 9:20-22, 27

And immediately he began proclaiming Jesus in the synagogues, saying, “This Man is the Son of God [the promised Messiah]!” All those who heard him continued to be amazed and said, “Is this not the man who in Jerusalem attacked those who called on this name [of Jesus], and had come here [to Damascus] for the express purpose of bringing them bound [with chains] before the chief priests?” But Saul increased in strength more and more, and continued to perplex the Jews who lived in Damascus by examining [theological evidence] and proving [with Scripture] that this Jesus is the Christ (the Messiah, the Anointed).

However, Barnabas took him and brought him to the apostles, and described to them how Saul had seen the Lord on the road [to Damascus], and how He had spoken to him, and how at Damascus Saul had preached openly and spoken confidently in the name of Jesus.