ISB ~ Acts 15 v39

a sharp contention:Paul and Barnabas go their separate ways after a dispute about John Mark, who abandoned their earlier mission (13:13). Barnabas decides to join his cousin Mark (Col 4:10) and return to his native island of Cyprus (4:36), while Paul teams up with Silas and then Timothy (16:1) to revisit the converts of Syria and Asia Minor (15:40-41).