Acts 18:18–21 (CSB)

18 After staying for some time, Paul said farewell to the brothers and sisters and sailed away to Syria, accompanied by Priscilla and Aquila. He shaved his head at Cenchreae because of a vow he had taken. 19 When they reached Ephesus he left them there, but he himself entered the synagogue and debated with the Jews. 20 When they asked him to stay for a longer time, he declined, 21 but he said farewell and added, “I’ll come back to you again, if God wills.” Then he set sail from Ephesus.