Acts 15:38 in the King James Version
But Paul thought not good to take him with them, who departed from them from Pamphylia, and went not with them to the work.
Context
37 Barnabas planned to take John, who was called Mark, with them also.
38 But Paul didn’t think that it was a good idea to take with them someone who had withdrawn from them in Pamphylia, and didn’t go with them to do the work.
39 Then the contention grew so sharp that they separated from each other. Barnabas took Mark with him and sailed away to Cyprus,