Heritage Source: The Great Interpretation of Dreams (Ibn Sirin)
Singing in the mosque indicates mocking religion and misguidance.
Heritage Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
Singing in the mosque indicates strife and heresy.
Heritage Source: Signs in the Science of Expressions (Ibn Shaheen)
Singing in the mosque is interpreted as worry and misguidance.