Matsya Purana — Catalogue of the Eighteen Puranas
महावराहस्य पुनर् माहात्म्यमधिकृत्य च विष्णुनाभिहितं क्षोण्यै तद्वाराहम् इहोच्यते //
mahāvarāhasya punar māhātmyamadhikṛtya ca viṣṇunābhihitaṃ kṣoṇyai tadvārāham ihocyate //
Now, taking up once again the greatness of the Great Boar (Mahāvarāha), this Vārāha teaching—spoken by Viṣṇu to the Earth—is here set forth.
Indirectly, it signals a Varaha-focused passage where Earth (Kṣoṇī) is central—typically tied to cosmic restoration after disorder, even when pralaya is not explicitly named in this verse.
As a framing verse, it does not prescribe duties directly; it introduces a sacred discourse on divine protection of the Earth, a thematic basis later used in Purāṇas to ground righteous governance (protecting land, order, and dharma).
No explicit Vāstu/ritual rule appears here; the verse functions as an introduction to the Varaha teaching, which in broader Purāṇic usage can support temple/ritual devotion to Varaha, but this line itself is purely contextual.