Matsya Purana — Nārāyaṇa as Haṃsa in the Cosmic Ocean: Vedic Yajña-Puruṣa and Mārkaṇḍeya’s Vi...
ततः कदाचिदथ वै पुनर्वक्त्राद्विनिःसृतः सुप्तं न्यग्रोधशाखायां बालमेकं निरैक्षत //
tataḥ kadācidatha vai punarvaktrādviniḥsṛtaḥ suptaṃ nyagrodhaśākhāyāṃ bālamekaṃ niraikṣata //
Then, at a certain time, he again emerged from the mouth and beheld a single child, asleep upon a branch of a banyan tree.
It presents a visionary motif often used in pralaya contexts: after an overwhelming dissolution, a lone child resting on a banyan branch signifies continuity of life and divine preservation beyond cosmic collapse.
Indirectly, it reinforces a key Purāṇic ethic: even amid crisis and uncertainty, one should remain attentive, discerning, and faithful to dharma—recognizing signs that guide right action rather than succumbing to despair.
No explicit Vāstu or ritual procedure is stated; the nyagrodha functions symbolically (a sacred, life-sustaining tree), frequently associated with sanctity, protection, and the idea of an enduring cosmic support.