Acts 18:24 (KJV)

And when he had landed at Cesarea, and gone up, and saluted the church, he went down to Antioch.

And after he had spent some time there, he departed, and went over all the country of Galatia and Phrygia in order, strengthening all the disciples.

And a certain Jew named Apollos, born at Alexandria, an eloquent man, and mighty in the scriptures, came to Ephesus.

This man was instructed in the way of the Lord; and being fervent in the spirit, he spake and taught diligently the things of the Lord, knowing only the baptism of John.

And he began to speak boldly in the synagogue: whom when Aquila and Priscilla had heard, they took him unto them, and expounded unto him the way of God more perfectly.