Matsya Purana — Vishnu’s Battle with the Daityas: Astra-Combat
तमप्रतर्क्यं जनयन्नजय्यं चक्रं पपात ग्रसनस्य कण्ठे द्विधा तु कृत्वा ग्रसनस्य कण्ठं तद्रक्तधारारुणघोरनाभि जगाम भूयो ऽपि जनार्दनस्य पाणिं प्रवृद्धानलतुल्यदीप्ति //
tamapratarkyaṃ janayannajayyaṃ cakraṃ papāta grasanasya kaṇṭhe dvidhā tu kṛtvā grasanasya kaṇṭhaṃ tadraktadhārāruṇaghoranābhi jagāma bhūyo 'pi janārdanasya pāṇiṃ pravṛddhānalatulyadīpti //
Making itself beyond anticipation and irresistible in force, the discus fell upon Grasana’s throat. Splitting his neck in two, that Sudarśana—its dreadful hub reddened by streaming blood—returned again to Janārdana’s hand, blazing like a greatly kindled fire.
This verse is not about pralaya; it highlights Vishnu’s invincible divine agency through the Sudarśana Chakra, emphasizing irresistible cosmic order rather than dissolution.
By portraying swift, decisive removal of a violent threat, it indirectly supports the Matsya Purana’s dharmic ideal that rulers must protect subjects and uphold order (dharma) with firm, proportionate force when necessary.
No direct Vastu or ritual procedure is taught here; the key technical takeaway is iconographic—Sudarśana is depicted as fire-bright and blood-reddened at the hub, a descriptive cue often echoed in Purāṇic visualizations of Vishnu’s weapons.