Matsya Purana — The Legend of Acchodā: Pitṛloka
द्वीपे तु बदरीप्राये बादरायणमच्युतम् स वेदमेकं बहुधा विभजिष्यति ते सुतः //
dvīpe tu badarīprāye bādarāyaṇamacyutam sa vedamekaṃ bahudhā vibhajiṣyati te sutaḥ //
But on the island—near Badarī—your son, the unfailing one (Acyuta) known as Bādarāyaṇa, will divide the single Veda into many portions.
Indirectly, it emphasizes post-crisis continuity: after cosmic upheavals, sacred knowledge is preserved and reorganized—here through Vyāsa dividing the single Veda for accessibility in later ages.
It supports dharma through right learning: kings and householders are to uphold social order by honoring Vedic tradition and ensuring teachings are transmitted in forms people can study and practice.
No direct Vāstu/temple rule is stated; the ritual takeaway is that Vedic rites depend on structured transmission of the Veda—this verse frames the authority behind later ritual divisions and recensions.