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.

Acts 15:12

15:12 The whole group kept quiet and listened to Barnabas and Paul while they explained all the miraculous signs and wonders God had done among the Gentiles through them.

Acts 15:37

15:37 Barnabas wanted to bring John called Mark along with them too,