This is the famous opening verse of the Shiva Tandava Stotram — a hymn of breathtaking energy and devotion. The stotra is traditionally attributed to Ravana, the great king of Lanka, who was a devoted worshipper of Shiva despite being the antagonist of the Ramayana.
The verse paints a vivid picture: the Ganga flowing through Shiva's matted hair, serpents coiling around his neck, and the crashing beat of the damaru drum as Shiva dances the Tandava — the cosmic dance of creation and destruction.
The sound pattern of the verse itself mimics the damaru — 'Damad damad damad daman' — making this shloka as much a musical experience as a poetic one. Reciting it aloud reveals its full power.