NET
26 Suddenly a great earthquake occurred, so that the foundations of the prison were shaken. Immediately all the doors flew open, and the bonds of all the prisoners came loose.
Darby
26 And suddenly there was a great earthquake, so that the foundations of the prison shook, and all the doors were immediately opened, and the bonds of all loosed.
KJV
26 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.