Matsya Purana — Pṛthu
दग्धुमेवोद्यतः कोपाच् छरेणामितविक्रमः ततो गोरूपमास्थाय भूः पलायितुम् उद्यता //
dagdhumevodyataḥ kopāc chareṇāmitavikramaḥ tato gorūpamāsthāya bhūḥ palāyitum udyatā //
In wrath, that hero of immeasurable prowess raised his arrow, intent only on burning her. Then the Earth, assuming the form of a cow, prepared to flee.
It portrays cosmic instability through a mythic crisis: the Earth (Bhūdevī) is threatened and takes a symbolic form (cow) to escape, a common Purāṇic way to signal disorder that precedes divine restoration.
By implication, it warns against governance or action driven by uncontrolled anger: wrath that threatens the very “Earth” symbolizes harm to subjects and stability, urging restraint and protection as core duties.
No direct Vāstu or ritual procedure is stated; the main takeaway is symbolic—Bhū (Earth) as a sanctified entity (Bhūdevī) who must be protected, a premise underlying land-rituals and later Vāstu consecrations.