The church in Jerusalem . . . sent out Barnabas to go as far as Antioch. . . . He was a good man, full of the Holy Spirit and of faith. Acts 11:22–24.
To James the Just, John, and Peter, the Lord imparted knowledge after His resurrection. These imparted it to the rest of the apostles. And the rest of the apostles imparted it to the Seventy, of whom Barnabas was one. Clement of Alexandria (c. 195, E), 2.579.