Matsya Purana — Skanda’s Consecration
पांशुवर्षमसृक्पातं गगनादवनीतले भुजनेत्रप्रकम्पं च वक्त्रशोषमनोभ्रमम् //
pāṃśuvarṣamasṛkpātaṃ gaganādavanītale bhujanetraprakampaṃ ca vaktraśoṣamanobhramam //
A rain of dust and a fall of blood from the sky onto the earth—trembling of the arms and eyes, dryness of the mouth, and a bewildering agitation of the mind—(these are seen as dreadful portents).
It lists ominous, abnormal phenomena—dust-rain, blood-rain, bodily tremors, and mental confusion—treated as warning-signs of impending calamity and large-scale disorder associated with pralaya-like conditions.
Such portents traditionally prompt heightened vigilance: a king should protect social order and perform appeasement rites, while householders are advised to maintain discipline, charity, and ritual steadiness when signs of instability appear.
The verse is not prescribing Vastu rules; its practical ritual takeaway is that these are inauspicious signs (arishta) that would warrant śānti/appeasement procedures rather than construction or consecration activities.