Acts 15:36-39

36 After some days Paul said to Barnabas, "Let's return now and visit our brothers in every city in which we proclaimed the word of the Lord, to see how they are doing."

37 Barnabas planned to take John with them also, who was called Mark.

38 But Paul didn't think that it was a good idea to take with them someone who withdrew from them from Pamphylia, and didn't go with them to do the work.

39 Then there arose a sharp contention, so that they separated from each other. Barnabas took Mark with him, and sailed away to Cyprus,