Acts 11:26

11:26 and when he found him, he brought him to Antioch. So for a whole year Barnabas and Saul met with the church and taught a significant number of people. Now it was in Antioch that the disciples were first called Christians.

Acts 15:2

15:2 When Paul and Barnabas had a major argument and debate with them, the church appointed Paul and Barnabas and some others from among them to go up to meet with the apostles and elders in Jerusalem about this point of disagreement.