Acts 16:23-27

When they had struck them with many blows, they threw them into prison, commanding the jailer to guard them securely;

and he, having received such a command, threw them into the inner prison and fastened their feet in the stocks.

Now about midnight Paul and Silas were praying and singing hymns of praise to God, and the prisoners were listening to them;

and suddenly there was a great earthquake, so that the foundations of the prison were shaken; and immediately all the doors were opened, and everyone’s chains were unfastened.

When the jailer awoke and saw the prison doors opened, he drew his sword and was about to kill himself, thinking that the prisoners had escaped.