Acts 15:36-40

After some time Paul said to Barnabas, “Let us go back and visit the brothers and sisters (believers) in every city where we preached the message of the Lord, and see how they are doing.” Now Barnabas wanted to take [his cousin] John, who was called Mark, along with them. But Paul kept insisting that they should not take along with them the one who had quit and deserted them in Pamphylia and had not gone on with them to the work. And it became such a sharp disagreement that they separated from one another, and Barnabas took [John] Mark with him and sailed away to Cyprus. But Paul chose Silas [who was again in Antioch] and set out [on his second journey], commended by the brothers to the grace and favor of the Lord.