Matsya Purana — Uma’s Austerities and the Slaying of the Deceiver Asura ĀḌi
यदा द्वितीयो रूपस्य विवर्तस्ते भविष्यति तदा ते भविता मृत्युर् अन्यथा न भविष्यति //
yadā dvitīyo rūpasya vivartaste bhaviṣyati tadā te bhavitā mṛtyur anyathā na bhaviṣyati //
When the second transformation of your form occurs, then your death will come to pass; it will not happen otherwise.
It frames mortality as governed by a fixed cosmic condition—death arrives only when a destined transformation occurs—reflecting the Purana’s worldview of time-bound, law-like transitions that also underlie Pralaya cycles.
By stressing the certainty and timing of death, it supports the Purana’s ethical urgency: a ruler or householder should act with dharma and preparedness, not complacency, because life’s end is determined and unavoidable once its condition ripens.
No direct Vastu or ritual instruction appears in this verse; its takeaway is doctrinal—ritual and right conduct are meaningful precisely because death is inevitable once the ordained change manifests.