Acts 15:36–40 (ESV)
Acts 15:36 And after some days Paul said to Barnabas, “Let us return and visit the brothers in every city where we proclaimed the word of the Lord, and see how they are.”
Acts 15:37 Now Barnabas wanted to take with them John called Mark.
Acts 15:38 But Paul thought best not to take with them one who had withdrawn from them in Pamphylia and had not gone with them to the work.
Acts 15:39 And there arose a sharp disagreement, so that they separated from each other. Barnabas took Mark with him and sailed away to Cyprus,
Acts 15:40 but Paul chose Silas and departed, having been commended by the brothers to the grace of the Lord.