त्रेता त्रीणि सहस्राणि युगसंख्याविदो विदुः तस्यापि त्रिशती संध्या संध्यांशः संध्यया समः //
tretā trīṇi sahasrāṇi yugasaṃkhyāvido viduḥ tasyāpi triśatī saṃdhyā saṃdhyāṃśaḥ saṃdhyayā samaḥ //
Знающие исчисление юг говорят, что Трета‑юга составляет три тысячи (божественных лет). Её сумеречный период (сандхья) — триста, и последующая сумеречная доля (сандхьямша) равна сандхье.
It gives the technical chronology of cosmic time (yuga length plus junctions), which is used in Purāṇas to situate recurring creation and dissolution cycles within a measurable framework.
By defining yuga-phases and their transitions, it supports the Purāṇic idea that dharma-practice and governance must adapt to the spiritual conditions of each age, especially during transitional “sandhyā” periods.
No direct Vāstu or temple rule is stated; the key ritual takeaway is the emphasis on “sandhyā” as a sacred junction concept—transitional times are treated as especially significant for discipline, vows, and rites in Purāṇic tradition.