Acts 9:26 — “When he [Paul] came to Jerusalem, he was trying to associate with the disciples; but they were all afraid of him, not believing that he was a disciple. But Barnabas took hold of him and brought him to the apostles and described to them how he had seen the Lord on the road, and that He had talked to him, and how at Damascus he had spoken out boldly in the name of Jesus.”
Acts 11:21-26 — “and a large number who believed turned to the Lord. The news about them reached the ears of the church at Jerusalem, and they sent Barnabas off to Antioch. … And considerable numbers were brought to the Lord. And he left for Tarsus to look for Saul [=Paul]; and when he had found him, he brought him to Antioch And for an entire year they met with the church and taught considerable numbers; and the disciples were first called Christians in Antioch.”
Acts 11:29-30 - ”in the proportion that any of the disciples had means, each of them determined to send a contribution for the relief of the brethren living in Judea. And this they did, sending it in charge of Barnabas and Saul to the elders.”
Right? (Plausibly from the late spring of A.D. 44 to the fall of A.D. 46). See all of Acts 13-14 for the details of Paul and Barnabas’s cooperative evangelism on this first missionary journey of Paul's.
Acts 15:12 — they were listening to Barnabas and Paul as they were relating what signs and wonders God had done through them among the Gentiles. (Cf. Acts 9:26-27)
Right?1 (Aside from a dispute over the dependeability of Barnabas’s cousin Mark—after all the drama and events of the first missionary journey— Barnabas and Paul were ready to work together again with the same message.)
1 Cor 9:6 — “Or do only Barnabas and I not have a right to refrain from working?”