Matsya Purana — The Greatness of Mount Kārpāsa and the Rite of the ‘Kārpāsa-Śailendra’
कार्पासपर्वतस् तद्वद् विंशद्भारैर् इहोत्तमः दशभिर्मध्यमः प्रोक्तः पञ्चभिस्त्वधमः स्मृतः भारेणाल्पधनो दद्याद् वित्तशाठ्यविवर्जितः //
kārpāsaparvatas tadvad viṃśadbhārair ihottamaḥ daśabhirmadhyamaḥ proktaḥ pañcabhistvadhamaḥ smṛtaḥ bhāreṇālpadhano dadyād vittaśāṭhyavivarjitaḥ //
Likewise, for a ‘mountain’ (heap) of cotton, a gift of twenty bhāras is considered the best here; ten bhāras is declared middling, and five bhāras is remembered as inferior. One of modest means should give according to (even) a single bhāra, free from deceit concerning wealth.
This verse does not discuss Pralaya; it focuses on dāna-dharma—grading charitable gifts by measured quantities and insisting on honesty in giving.
It sets practical standards for charity: the wealthy are encouraged toward higher grades of giving, while a person of limited means should still give proportionately—without misrepresentation or stinginess disguised as generosity.
No Vāstu or temple-architecture rule appears here; the ritual significance is the quantified standardization of gifts (cotton measured in bhāras) as part of dharmic giving.