New Revised Standard Version
Suddenly there was an earthquake, so violent that the foundations of the prison were shaken; and immediately all the doors were opened and everyone’s chains were unfastened.

Contemporary English Version
Suddenly a strong earthquake shook the jail to its foundations. The doors opened, and the chains fell from all the prisoners.

New American Bible
there was suddenly such a severe earthquake that the foundations of the jail shook; all the doors flew open, and the chains of all were pulled loose.

Douay-Rheims Bible
And suddenly there was a great earthquake, so that the foundations of the prison were shaken. And immediately all the doors were opened and the bands of all were loosed.

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

suddenly.

Acts 4:31 And when they had prayed, the place was moved wherein they were assembled: and they were all filled with the Holy Ghost: and they spoke the word of God with confidence.

Acts 5:19 But an angel of the Lord by night, opening the doors of the prison and leading them out, said:

Acts 12:7,10 And behold an angel of the Lord stood by him and a light shined in the room. And he, striking Peter on the side, raised him up, saying: Arise quickly. And the chains fell off from his hands. . . .

Matthew 28:2 And behold there was a great earthquake. For an angel of the Lord descended from heaven and coming rolled back the stone and sat upon it.

Revelation 6:12 And I saw, when he had opened the sixth seal: and behold there was a great earthquake. And the sun became black as sackcloth of hair: and the whole moon became as blood.

Revelation 11:13 And at that hour there was made a great earthquake: and the tenth part of the city fell. And there were slain in the earthquake, names of men, seven thousand: and the rest were cast into a fear and gave glory to the God of heaven.

and every.

Psalm 79:11 Let the sighing of the prisoners come in before thee. According to the greatness of thy arm, take possession of the children of them that have been put to death.

Psalm 102:20 That he might hear the groans of them that are in fetters: that he might release the children of the slain:

Psalm 146:7 Who keepeth truth for ever: who executeth judgment for them that suffer wrong: who giveth food to the hungry. The Lord looseth them that are fettered:

Isaiah 42:7 That thou mightest open the eyes of the blind, and bring forth the prisoner out of prison, and them that sit in darkness out of the prison house.

Isaiah 61:1 The spirit of the Lord is upon me, because the Lord hath anointed me: he hath sent me to preach to the meek, to heal the contrite of heart, and to preach a release to the captives, and deliverance to them that are shut up.

Zechariah 9:11,12 Thou also by the blood of thy testament hast sent forth thy prisoners out of the pit, wherein is no water. . . .