Acts 12:25
So Barnabas and Saul returned to Jerusalem when they had completed their mission, bringing along with them John Mark.
Acts 12:12
When Peter realized this, he went to the house of Mary, the mother of John Mark, where many people had gathered together and were praying.
Acts 4:36
So Joseph, a Levite who was a native of Cyprus, called by the apostles Barnabas (which is translated "son of encouragement"),
Acts 11:29-30
So the disciples, each in accordance with his financial ability, decided to send relief to the brothers living in Judea.
Acts 13:1-52
Now there were these prophets and teachers in the church at Antioch: Barnabas, Simeon called Niger, Lucius the Cyrenian, Manaen (a close friend of Herod the tetrarch from childhood) and Saul.
Acts 15:37
Barnabas wanted to bring John called Mark along with them too,
1 Peter 5:13
The church in Babylon, chosen together with you, greets you, and so does Mark, my son.