Matsya Purana — The Battle for Tripura: Portents
परस्परेण कलहं कुर्वाणा भीममूर्तयः भ्रमन्ते भक्षयन्तश्च दानवानां च लोहितम् //
paraspareṇa kalahaṃ kurvāṇā bhīmamūrtayaḥ bhramante bhakṣayantaśca dānavānāṃ ca lohitam //
Taking on terrifying forms, they wander about fighting among themselves, devouring one another—and even drinking the blood of the Dānavas.
It depicts a hallmark of pralaya-like disorder: beings fall into mutual violence and self-consumption, showing dharma’s collapse and the world’s inversion before large-scale destruction.
By contrast, it implies that a king must prevent factional conflict and protect social order, while householders should restrain anger and greed—since uncontrolled passions lead to the same self-destructive chaos shown here.
No direct vastu/ritual rule is stated; the takeaway is contextual—ritual and sacred order are meaningful precisely because they counteract the kind of lawless turbulence and impurity (bloodshed) portrayed in this verse.