Acts 14:23

14:23 When they had appointed elders for them in the various churches, with prayer and fasting they entrusted them to the protection of the Lord in whom they had believed.

Acts 16:16

Paul and Silas Are Thrown Into Prison

16:16 Now as we were going to the place of prayer, a slave girl met us who had a spirit that enabled her to foretell the future by supernatural means. She brought her owners a great profit by fortune-telling.