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

And suddenly there was an earth-shock, so that the base of the prison was moved: and all the doors came open, and everyone's chains came off.

Και εξαιφνης εγεινε σεισμος μεγας, ωστε εσαλευθησαν τα θεμελια του δεσμωτηριου, και παρευθυς ηνοιχθησαν πασαι αι θυραι και ελυθησαν παντων τα δεσμα.

And 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.