Matsya Purana — Solar–Lunar Motions
लोकपालाः स्थितास्तत्र लोकालोकस्य मध्यतः चत्वारस्ते महात्मानस् तिष्ठन्त्याभूतसंप्लवम् //
lokapālāḥ sthitāstatra lokālokasya madhyataḥ catvāraste mahātmānas tiṣṭhantyābhūtasaṃplavam //
There, in the central region of Lokāloka, the four great-souled Lokapālas, Guardians of the Worlds, stand stationed, remaining at their posts until the dissolution of all beings (saṃplava).
It states that the Lokapālas maintain their cosmic posts at Lokāloka continuously, enduring in duty until the universal dissolution (ābhūtasaṃplava), highlighting order (ṛta) persisting up to Pralaya.
By portraying unwavering guardianship “until Pralaya,” it models steadfast dharma: rulers and householders should protect their domain and uphold order without abandoning responsibility in times of crisis.
While not a Vāstu rule directly, it reinforces the directional-cosmic framework behind ritual space: temples and rites often invoke the Dikpālas/Lokapālas to stabilize directions, reflecting the universe’s guarded order.