Acts 18:21 in the World English Bible
but taking his leave of them, he said, “I must by all means keep this coming feast in Jerusalem, but I will return again to you if God wills.” Then he set sail from Ephesus.
Context
20 When they desired him to tarry longer time with them, he consented not;
21 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.
22 And when he had landed at Cæsarea, and gone up, and saluted the church, he went down to Antioch.