NET
21 but said farewell to them and added, “I will come back to you again if God wills.” Then he set sail from Ephesus,
Darby
21 but bade them farewell, saying, [I must by all means keep the coming feast at Jerusalem]; I will return to you again, if God will: and he sailed away from Ephesus.
KJV
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.