Barnabas and Paul bring assistance to Judea
Barnabas and Paul went to Judea to bring assistance to the church there, and returned to Antioch with John Mark.
Key passages
Ac 11:30

which they also did, sending the aid to the elders by the hand of Barnabas and Saul.

Ac 12:25

So Barnabas and Saul returned to Jerusalem when they had completed their service, having taken along with them John (who is also called Mark).

See also