Barnabas and Saul taught many believers at Antioch.

Acts 11:25-26

25 Then Barnabas went to Tarsus in Cilicia province to try to find Saul. 26 After he found him, Barnabas brought him back to Antioch to help teach the believers. So during a whole year Barnabas and Saul met regularly with the congregation there and taught many of them about Jesus. It was at Antioch that the believers were first called Christians {that people first called the believers Christians}.