Acts 16:25-33

But about midnight when Paul and Silas were praying and singing hymns of praise to God, and the prisoners were listening to them; suddenly there was a great earthquake, so [powerful] that the very foundations of the prison were shaken and at once all the doors were opened and everyone’s chains were unfastened. When the jailer, shaken out of sleep, saw the prison doors open, he drew his sword and was about to kill himself, thinking that the prisoners had escaped. But Paul shouted, saying, “Do not hurt yourself, we are all here!” Then the jailer called for torches and rushed in, and trembling with fear he fell down before Paul and Silas, and after he brought them out [of the inner prison], he said, “Sirs, what must I do to be saved?” And they answered, “Believe in the Lord Jesus [as your personal Savior and entrust yourself to Him] and you will be saved, you and your household [if they also believe].” And they spoke the word of the Lord [concerning eternal salvation through faith in Christ] to him and to all who were in his house. And he took them that very hour of the night and washed their bloody wounds, and immediately he was baptized, he and all his household.