Acts 18:21 in the King James Version
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.
Context
20 When they asked him to stay with them a longer time, he declined;
21 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.
22 When he had landed at Caesarea, he went up and greeted the assembly, and went down to Antioch.