Acts 18:19-21
18:19 When they reached Ephesus, Paul left Priscilla and Aquila behind there, but he himself went into the synagogue and addressed the Jews.
18:20 When they asked him to stay longer, he would not consent,
18:21 but said farewell to them and added, “I will come back to you again if God wills.” Then he set sail from Ephesus,