Acts 15:35-37

³⁵But Paul and Barnabas kept on in Antioch, teaching and preaching the word of God, with a number of others.

³⁶And after some days, Paul said to Barnabas, Let us go back and see the brothers in every town where we have given the word of God, and see how they are.

³⁷And Barnabas had a desire to take with them John, named Mark.