Acts 18:23-25 New King James Version (NKJV)
23 After he had spent some time there, he departed and went over the region of Galatia and Phrygia [a]in order, strengthening all the disciples.
Ministry of Apollos
24 Now a certain Jew named Apollos, born at Alexandria, an eloquent man and mighty in the Scriptures, came to Ephesus. 25 This man had been instructed in the way of the Lord; and being fervent in spirit, he spoke and taught accurately the things of the Lord, though he knew only the baptism of John.