Barnabas wanted to take with them John called Mark.
As soon as he realized this, he went to the house of Mary, the mother of John whose other name was Mark, where many had gathered and were praying.
Then after completing their mission Barnabas and Saul returned to Jerusalem and brought with them John, whose other name was Mark.
Then Paul and his companions set sail from Paphos and came to Perga in Pamphylia. John, however, left them and returned to Jerusalem,
When they arrived at Salamis, they proclaimed the word of God in the Jewish synagogues. And they had John also to assist them.
The disagreement became so sharp that they parted company; Barnabas took Mark with him and sailed away to Cyprus.
Aristarchus my fellow prisoner greets you, as does Mark the cousin of Barnabas, concerning whom you have received instructions; if he comes to you, welcome him.
Only Luke is with me. Get Mark and bring him with you, for he is useful to me in ministry.
and so do Mark, Aristarchus, Demas, and Luke, my coworkers.
Your sister church in Babylon, chosen together with you, sends you greetings, and so does my son Mark.