Matsya Purana — Vishnu’s Battle with Mathana
तस्मिन्विनिहते दैत्ये ग्रसने लोकनायके निर्मर्यादमयुध्यन्त हरिणा सह दानवाः //
tasminvinihate daitye grasane lokanāyake nirmaryādamayudhyanta hariṇā saha dānavāḥ //
When that Daitya—Grasana, the leader of the worlds—had been slain, the Dānavas then fought on with Hari, casting all restraint aside.
This verse is not about Pralaya; it depicts a post-slaying escalation in a divine battle, emphasizing how adharma forces continue violently even after their leader falls.
Indirectly, it contrasts lawful conduct with “nirmaryāda” (unrestrained) behavior—implying that rulers and householders should uphold maryādā (ethical boundaries) even under conflict.
No Vastu, temple, or ritual procedure is stated in this verse; its key takeaway is ethical—restraint (maryādā) versus lawless aggression in the face of divine order.