Matsya Purana — Vishnu’s Battle with the Daityas: Astra-Combat
छिन्ने धनुषि गोविन्दो गदां जग्राह भीषणाम् तां प्राहिणोत्स वेगेन मथनाय महाहवे //
chinne dhanuṣi govindo gadāṃ jagrāha bhīṣaṇām tāṃ prāhiṇotsa vegena mathanāya mahāhave //
When his bow was cut, Govinda seized a fearsome mace; and in that great battle he hurled it with speed at Mathana.
This verse does not address Pralaya; it is a battlefield vignette emphasizing divine valor—Govinda swiftly switching weapons after his bow is cut.
Indirectly, it models kṣātra-dharma (the warrior ethic): steadiness under reversal, readiness, and decisive action—qualities praised for rulers and protectors in Purāṇic ethics.
No Vāstu or ritual procedure is stated here; the technical focus is on astras/śastras (weaponry) and the narrative portrayal of combat skill.