And when Saul had come to Jerusalem, he tried to join the disciples; but they were all afraid of him, and did not believe that he was a disciple. 27 But Barnabas took him and brought him to the apostles. And he declared to them how he had seen the Lord on the road, and that He had spoken to him, and how he had preached boldly at Damascus in the name of Jesus. 28 So he was with them at Jerusalem, coming in and going out. 29 And he spoke boldly in the name of the Lord Jesus and disputed against the Hellenists, but they attempted to kill him. 30 When the brethren found out, they brought him down to Caesarea and sent him out to Tarsus. — Acts 9:26-30.
After narrowly escaping from Damascus, Saul comes to Jerusalem and tries to join the disciples there; but they are all afraid of him because of his previous persecution of the disciples. They do not believe he is a disciple. Barnabas introduces him to the apostles. Saul declares to them of his encounter with Jesus on the Damascus road, and how he had boldly preached Jesus in Damascus. So he was with them at Jerusalem. He spoke boldly in the name of the Lord Jesus and disputed against the Hellenists, Greek-speaking Jews of the Diaspora, who had returned to settle in Jerusalem. But they attempted to kill him! When the brethren find out, they take him to Caesarea and send him out to Tarsus.