Acts 13:6

“Beware of the false prophets, who come to you in sheep’s clothing, but inwardly are ravenous wolves.

Now there was a man named Simon, who formerly was practicing magic in the city and astounding the people of Samaria, claiming to be someone great;

And they were giving him attention because he had for a long time astounded them with his magic arts.

And Barnabas and Saul returned to Jerusalem, fulfilling their ministry, taking along with them John, who was also called Mark.

Now after Paul and his companions set sail from Paphos, they came to Perga in Pamphylia, but John left them and returned to Jerusalem.