Acts 15:37 in the King James Version
And Barnabas determined to take with them John, whose surname was Mark.
Context
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, 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38 But Paul didn’t think that it was a good idea to take with them someone who had withdrawn from them in Pamphylia, and didn’t go with them to do the work.