Acts 15:35-37

³⁵And Paul and Barnabas continued at Antioch, teaching and preaching, with many others, the word of the Lord.

³⁶And after some days, Paul said to Barnabas: Let us return and visit our brethren in all the cities wherein we have preached the word of the Lord, to see how they do.

³⁷And Barnabas would have taken with them John also, that was surnamed Mark;