Acts 15:35-37

³⁵But Paul and Barnabas tarried in Antioch, teaching and preaching the word of the Lord, with many others also.

³⁶And after some days Paul said unto Barnabas, Let us return now and visit the brethren in every city wherein we proclaimed the word of the Lord, and see how they fare.

³⁷And Barnabas was minded to take with them John also, who was called Mark.