Matsya Purana — Vishnu’s Names Across Yugas and the Gods’ Refuge During the Tārakāmaya War
चतुर्युगान्तपर्याये लोकानां यद्भयं भवेत् अरूपवन्ति रूपाणि तस्मिन्नुत्पातलक्षणे //
caturyugāntaparyāye lokānāṃ yadbhayaṃ bhavet arūpavanti rūpāṇi tasminnutpātalakṣaṇe //
At the recurring juncture marking the end of the four-yuga cycle, whatever fear arises among the worlds—then, at that time characterized by ominous portents, even forms become formless (their appearance is distorted and unnatural).
It points to pre-dissolution conditions: at the cyclic end of the four-yuga span, fear spreads through the worlds and reality appears distorted—“forms” lose their normal, stable nature—signaling impending upheaval.
By highlighting collective fear and abnormal signs, it implies the need for dharmic steadiness—leaders and householders should respond to social panic with order, restraint, and ritual-ethical conduct rather than confusion when ominous conditions arise.
No direct Vāstu rule is stated; the ritual takeaway is that “utpāta-lakṣaṇa” (ominous marks) are to be recognized as signals for heightened śānti (appeasement) rites and protective observances when abnormalities appear.