Matsya Purana — Division of Bhārata-varṣa
सुदर्शनो नाम महाञ् जम्बूवृक्षः सनातनः नित्यपुष्पफलोपेतः सिद्धचारणसेवितः //
sudarśano nāma mahāñ jambūvṛkṣaḥ sanātanaḥ nityapuṣpaphalopetaḥ siddhacāraṇasevitaḥ //
There is an ancient, mighty jambu tree named Sudarśana—everlasting, ever adorned with flowers and fruits, and attended by Siddhas and Cāraṇas.
It does not describe Pralaya directly; it presents a stable, timeless feature of Puranic cosmography—an “eternal” sacred tree—highlighting the ordered structure of the cosmos rather than its dissolution.
Indirectly, it supports Dharma by portraying sacred geography as a framework for pilgrimage, reverence, and cosmological literacy—values that a king protects (tīrtha, tradition) and a householder honors (śraddhā, worship, giving).
No direct Vāstu rule is stated, but the verse implies ritual sanctity around cosmic landmarks; in temple/ritual planning, such “divine trees” function as auspicious symbols (sthala-vṛkṣa concept) and focal points for worship and sacred space design.