Acts 12:12

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 12:25

12:25 So Barnabas and Saul returned to Jerusalem when they had completed their mission, bringing along with them John Mark.

Acts 13:13

Paul and Barnabas at Pisidian Antioch

13:13 Then Paul and his companions put out to sea from Paphos and came to Perga in Pamphylia, but John left them and returned to Jerusalem.

Acts 15:37-39

15:37 Barnabas wanted to bring John called Mark along with them too, 15:38 but Paul insisted that they should not take along this one who had left them in Pamphylia and had not accompanied them in the work. 15:39 They had a sharp disagreement, so that they parted company. Barnabas took along Mark and sailed away to Cyprus,

Colossians 4:10

4:10 Aristarchus, my fellow prisoner, sends you greetings, as does Mark, the cousin of Barnabas (about whom you received instructions; if he comes to you, welcome him).

Colossians 4:2

Exhortation to Pray for the Success of Paul’s Mission

4:2 Be devoted to prayer, keeping alert in it with thanksgiving.

Colossians 4:11

4:11 And Jesus who is called Justus also sends greetings. In terms of Jewish converts, these are the only fellow workers for the kingdom of God, and they have been a comfort to me.