Acts 16:24-28

and he, having received such a command, threw them into the inner prison and fastened their feet in the stocks. But about midnight Paul and Silas were praying and singing hymns of praise to God, and the prisoners were listening to them; and suddenly there came a great earthquake, so that the foundations of the prison house 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, supposing that the prisoners had escaped. But Paul cried out with a loud voice, saying, “Do not harm yourself, for we are all here!”