Acts 19:1

While Apollos was at Corinth, the record now returns to Paul. Apollos found in Corinth a very effective center for his work in Achaia and seems to have made this his headquarters for the time. At this juncture Paul was proceeding westward across Asia Minor toward Ephesus. The "upper coasts" or "upper regions" lay farther inland, probably through Lycaonia, Galatia, and Phrygia, which he had visited before. This visit to Ephesus fulfilled the promise he made when he left the city before. Certain disciples are called so because, like Apollos, they had learned some things concerning Jesus and were drawn to listen to Paul, who could teach them more.