天鼓

The (sa) deva drum-- in the 善法 Good Law Hall of the Trayas-triṃśas heavens, which sounds of itself, warning the inhabitants of the thirty-three heavens that even their life is impermanent and subject to karma: at the sound of the drum Indra preaches against excess. Hence it is a title of Buddha as the great law-drum, who warns, exhorts, and encourages the good and frightens the evil and the demons.