Matsya Purana — Agastya’s Origin
ततो ऽस्य वरदाः सर्वे बभूवुः शंकरादयः ब्रह्मा विष्णुश्च भगवान् वरदानाय जग्मतुः वरं वृणीष्व भद्रं ते यदभीष्टं च वै मुने //
tato 'sya varadāḥ sarve babhūvuḥ śaṃkarādayaḥ brahmā viṣṇuśca bhagavān varadānāya jagmatuḥ varaṃ vṛṇīṣva bhadraṃ te yadabhīṣṭaṃ ca vai mune //
Then all of them—Śaṅkara and the others—stood ready to grant him boons; and the blessed Brahmā and Lord Viṣṇu approached to bestow a boon, saying: “Choose a boon—may it be well with you—whatever you desire, O sage.”
This verse does not describe pralaya directly; it highlights divine anugraha (grace) where Brahmā, Viṣṇu, and Śaṅkara’s group become “boon-givers,” a common Purāṇic motif that often frames cosmic events but here focuses on granting a personal boon.
Indirectly, it models the Purāṇic ethic that sincere austerity, devotion, or righteous conduct can attract divine favor; for kings and householders, it implies that dharma-oriented living and humility before the divine are prerequisites for receiving legitimate prosperity or success.
No Vāstu or temple-building rule is stated in this verse; its ritual takeaway is the formal moment of varadāna—deities inviting the devotee to state the intended boon, a pattern echoed in many consecration and vow-related narratives.