But at midnight Paul and Silas were praying and singing hymns to God, and the prisoners were listening to them. Suddenly there was a great eathquake, so that the foundations of the prison were shaken: and imediately all the doors were opened and everyone's chains were loosed.

Acts 16:25-26

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At about midnight, when all is dark, I call unto the Lord. He hears my cry and He comes to my rescue. He opens the doors and He breaks all my chains.