Some Jews began teaching that Gentiles could not be saved unless they were circumcised. Paul and Barnabas challenged them, and ultimately this dispute was brought before the Church in Jerusalem where the decision was made stating circumcision was not required due to references in the Old Testament, which presentated by James. Paul, who was in Antioch, spoke with Barnabas regarding meeting with the bretheren in all the cities the ministered in, to see how they were doing. Barnabas wanted to take John Mark with them, but Paul said no, so Mark went with Barnabas and Silas went with Paul.