Acts 15:38 in the World English Bible
But Paul didn’t think that it was a good idea to take with them someone who had withdrawn from them in Pamphylia, and didn’t go with them to do the work.
Context
37 And Barnabas determined to take with them John, whose surname was Mark.
38 But Paul thought not good to take him with them, who departed from them from Pamphylia, and went not with them to the work.
39 And the contention was so sharp between them, that they departed asunder one from the other: and so Barnabas took Mark, and sailed unto Cyprus;