During the two years that the Apostle Paul spent in prison at Caesarea (Acts 24:27), certain of his fellow workers had sufficient access to him that he could include them with the note “sends greetings” in the epistles that he wrote at that time. Their number included his “fellow laborers” Mark, Aristarchus, Demas, and Luke (Phm. 24). It is curious, as we shall see, that Paul mentions Demas and Luke together. Near the end of the Epistle to the Colossians (4:14), composed during the same period, Paul wrote, “Luke the beloved physician and Demas greet you.”
It appears that these two men, Demas and Luke, afterwards traveled with Paul to Rome, where he spent another two years under house arrest (Acts 28:30) . . .