Acts 16:25-28

²⁵And at midnight Paul and Silas prayed, and sang praises unto God: and the prisoners heard them.

²⁶And suddenly there was a great earthquake, so that the foundations of the prison were shaken: and immediately all the doors were opened, and every one’s bands were loosed.

²⁷And the keeper of the prison awaking out of his sleep, and seeing the prison doors open, he drew out his sword, and would have killed himself, supposing that the prisoners had been fled.

²⁸But Paul cried with a loud voice, saying, Do thyself no harm: for we are all here.