Acts 15:37-41  (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;  (40)  And Paul chose Silas, and departed, being recommended by the brethren unto the grace of God.  (41)  And he went through Syria and Cilicia, confirming the churches.

Acts 15:18  Known unto God are all his works from the beginning of the world.