Acts 18:18-21

And Paul after this tarried there yet a good while, and then took his leave of the brethren, and sailed thence into Syria, and with him Priscilla and Aquila; having shorn his head in Cenchrea: for he had a vow. And he came to Ephesus, and left them there: but he himself entered into the synagogue, and reasoned with the Jews. When they desired him to tarry longer time with them, he consented not; but bade them farewell, saying, I must by all means keep this feast that cometh in Jerusalem: but I will return again unto you, if God will. And he sailed from Ephesus.