Barnabas and Saul returned from Jerusalem - where, it thus appears, they had remained during all this persecution.
when they had fulfilled their ministry - or service; that mentioned on Act 11:29, Act 11:30.
took with them John ... Mark - (See on Act 12:12), not to be confounded with the second Evangelist, as is often done. As his uncle was Barnabas, so his spiritual father was Peter (1Pe 5:13).