Acts 16:24-26

To put a final quietus to all the trouble, they cast Paul and Silas into the deep, dark dungeon of their cruel, filthy old prison, with their lacerated, bleeding backs down on the cold, stone floor, and their feet raised up and wedged fast in great blocks of wood, thus precluding all possibility of escape. If you had been in their place, would you not have concluded that you were mistaken as to the call of God to that place? Paul and Silas, while the hours glide away, tell their experiences, pray to God, get very happy and continue to sing uproariously the praises of God, arresting the attention and astonishing the suffering inmates of those gloomy dungeons, utterly unaccustomed to hear songs of joy. At midnight God answers their prayer with the earthquake shock, disrupting the deep foundations of the prison, snapping all the bars and bolts, and slamming back the ponderous iron doors against the massive stone walls like claps of thunder.