त्रेतायुगस्वभावेन संध्यापादेन वर्तते संध्यापादः स्वभावाच्च यो ऽंशः पादेन तिष्ठति //
tretāyugasvabhāvena saṃdhyāpādena vartate saṃdhyāpādaḥ svabhāvācca yo 'ṃśaḥ pādena tiṣṭhati //
По присущей природе Трета-юги век протекает с «сандхья-падой», то есть с сумеречной четвертью. И эта сумеречная четверть по самой своей природе есть та доля, что стоит как одна четверть целого.
It does not describe Pralaya directly; it clarifies Puranic time-measurement by stating that Tretā-yuga includes a defined transitional ‘twilight-quarter’ (saṃdhyā-pāda), a key idea used in larger cosmic-cycle calculations.
By marking Tretā-yuga as a phase with a specific transitional quarter, it implies that dharma and social duties are time-conditioned; kings and householders are expected to align conduct and governance with the yuga’s prevailing moral-spiritual capacity.
No direct Vāstu or temple rule is stated; the practical takeaway is calendrical—ritual timing and tradition often rely on Puranic time-structures (yuga and saṃdhyā divisions) when framing long-cycle religious narratives and norms.