ActAt ActsAtti, chaptercapitolo Acts of the ApostlesAtti degli Apostoli, chaptercapitolo 18

Then they arrived in Ephesus, and Rav Sha'ul left them there, but he joined the minyan in the shul and debated with the Yehudim. And when they were asking Rav Sha'ul to stay for a longer time, he did not give his consent. But taking leave of them, he said, I will return again im yirtzeh Hashem (G-d willing). Then Rav Sha'ul set sail from Ephesus.Jas 4:15; 1Co 4:19