Matsya Purana — The Battle for Tripura: Portents
यज्ञोपवीतम् आदाय चिछेद च ननाद च ततः सिंहरवो घोरः शङ्खशब्दश्च भैरवः गणेश्वरैः कृतस्तत्र तारकाख्ये निषूदिते //
yajñopavītam ādāya cicheda ca nanāda ca tataḥ siṃharavo ghoraḥ śaṅkhaśabdaśca bhairavaḥ gaṇeśvaraiḥ kṛtastatra tārakākhye niṣūdite //
Seizing the sacred thread (yajñopavīta), he tore it away and roared. Then, when the one called Tāraka had been slain, a dreadful lion-like roar and a fearsome conch-blast arose there, raised by the hosts of the Gaṇeśvaras.
This verse does not discuss Pralaya; it depicts a victory moment in a mythic battle episode—marked by the tearing of the yajñopavīta and the terrifying roar and conch-sound raised by the Gaṇeśvaras after Tāraka’s death.
Indirectly, it highlights the ritual identity signified by the yajñopavīta (a key marker of Vedic discipline for householders), but here it is used in a dramatic narrative gesture rather than as a prescriptive dharma rule for kings or गृहस्थs.
The explicit ritual element is the yajñopavīta (sacred thread) and the śaṅkha-śabda (conch blast), both strongly associated with Vedic/temple ritual culture; the verse uses them as symbols of charged religious identity and victorious proclamation.