Matsya Purana — Soma
असिपत्त्रवने चैव पात्यमानाः स्वकर्मभिः तत्रस्थानां तु तेषां वै दुःखितानाम् अशायिनाम् //
asipattravane caiva pātyamānāḥ svakarmabhiḥ tatrasthānāṃ tu teṣāṃ vai duḥkhitānām aśāyinām //
And in the forest of sword-like leaves (Asipattravana) they are cast down by their own deeds; and for those who remain there—anguished and unable to lie down—there is indeed only suffering.
This verse is not about Pralaya; it teaches karma-phala—how one’s own actions lead to post-death suffering in specific hell-realms like Asipattravana.
It underscores moral accountability: rulers and householders must uphold dharma and avoid harmful acts, since “svakarma” (one’s own deeds) becomes the direct cause of suffering after death.
No Vastu/temple-architecture rule is stated here; the focus is ethical and eschatological—warning through vivid Naraka imagery to reinforce right conduct and restraint.