Matsya Purana — The Greatness of Prayāga
यथा योगसहस्रेण योगो लभ्येत मानवैः यस्तु सर्वाणि रत्नानि ब्राह्मणेभ्यः प्रयच्छति //
yathā yogasahasreṇa yogo labhyeta mānavaiḥ yastu sarvāṇi ratnāni brāhmaṇebhyaḥ prayacchati //
Just as yoga is attained by people through a thousandfold practice of yogic discipline, so too does one attain that spiritual gain who bestows all precious jewels upon Brahmins.
This verse does not address Pralaya directly; it focuses on dāna-dharma, teaching that charitable giving can yield a spiritual attainment comparable to intensive yogic practice.
It supports the householder/kingly duty of dāna (charitable patronage): honouring Brahmins through valuable gifts is presented as a powerful means to gain spiritual merit and inner attainment alongside (or comparable to) yogic discipline.
No Vāstu or temple-architecture rule is stated here; the ritual takeaway is the emphasis on properly directed charity—ratna-dāna to worthy Brahmins—as a dharmic act with high spiritual फल (phala).