Matsya Purana — The Rite of the Jaggery-Cow
कृष्णाजिनं चतुर्हस्तं प्राग्ग्रीवं विन्यसेद्भुवि गोमयेनानुलिप्तायां दर्भानास्तीर्य सर्वतः //
kṛṣṇājinaṃ caturhastaṃ prāggrīvaṃ vinyasedbhuvi gomayenānuliptāyāṃ darbhānāstīrya sarvataḥ //
On the ground, first smeared with cow-dung, one should spread darbha grass on all sides and then place a black antelope-skin measuring four hands in length, with its neck-end oriented toward the east.
This verse is not about Pralaya; it gives practical ritual directions for preparing a purified worship space and seat.
It reflects the dharmic duty of maintaining purity and correct procedure in daily/occasional rites—guidance applicable to householders and rulers performing sanctioned worship and vows.
It prescribes a standard consecrated setup: purified ground (gomaya), protective/auspicious darbha spread, and an east-oriented āsana (kṛṣṇājina) with a specified measure—key ritual and Vastu-alignment principles.