They had every reason to be silent. They chose to sing instead β and the prison shook.
Acts 16:25β26
"About midnight Paul and Silas were praying and singing hymns to God, and the other prisoners were listening to them. Suddenly there was such a violent earthquake that the foundations of the prison were shaken. At once all the prison doors flew open, and everyone's chains came loose."
What in this midnight scene is God pointing out to you today?