Barnabas and Saul returned to Jerusalem, when they had fulfilled their service, also taking with them John whose surname was Mark.
TSK
TSK · Philemon 1:24
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Barnabas planned to take John, who was called Mark, with them also.
Embarking in a ship of Adramyttium, which was about to sail to places on the coast of Asia, we put to sea; Aristarchus, a Macedonian of Thessalonica, being with us.
But I counted it necessary to send to you Epaphroditus, my brother, fellow worker, fellow soldier, and your apostle and servant of my need;
Aristarchus, my fellow prisoner, greets you, and Mark, the cousin of Barnabas (concerning whom you received commandments, "if he comes to you, receive him"),
for Demas left me, having loved this present world, and went to Thessalonica; Crescens to Galatia, and Titus to Dalmatia.
We therefore ought to receive such, that we may be fellow workers for the truth.