Acts 15:36-38

Then after some days Paul said to Barnabas, “Let us now go back and visit our brethren in every city where we have preached the word of the Lord, and see how they are doing.” Now Barnabas was determined to take with them John called Mark. But Paul insisted that they should not take with them the one who had departed from them in Pamphylia, and had not gone with them to the work.