Acts 16:24-28

ISV(i) 24 Having received these orders, he put them into the inner cell and fastened their feet in leg irons.
25 Around midnight, Paul and Silas were praying and singing hymns to God, and the other prisoners were listening to them. 26 Suddenly, there was an earthquake so violent that the foundations of the prison were shaken. All the doors immediately flew open, and everyone’s chains were unfastened.
27 When the jailer woke up and saw the prison doors wide open, he drew his sword and was about to kill himself, since he thought the prisoners had escaped. 28 But Paul shouted in a loud voice, “Don’t hurt yourself, because we are all here!”