Matsya Purana — The Battle at Tripura: Shiva’s Strategy
अनाहताश्च वियति देवदुन्दुभयस्तथा नदन्तो मेघशब्देन शरभा इव रोषिताः //
anāhatāśca viyati devadundubhayastathā nadanto meghaśabdena śarabhā iva roṣitāḥ //
In the sky, the divine kettledrums (devadundubhi) resounded of their own accord, roaring with a thunder-like sound—like śarabhas roused to fury.
This verse is not describing Pralaya; it depicts auspicious, otherworldly sounds (divine drums in the sky) that function as portents confirming the power and sanctity of a sacred event.
It supports the Purāṇic ethic of recognizing and honoring auspicious signs during dharmic acts—kings and householders are encouraged to sponsor and conduct rites (especially temple worship and consecrations) with attentiveness to such omens as indicators of ritual success.
The “unstruck” celestial drum-sound is a classic consecration/ritual omen: in temple-building, installation (pratiṣṭhā), or major pūjā sequences, such signs are treated as confirmation that the rite is properly performed and divinely approved.