Matsya Purana — Soma
स्वधामृतं तु सोमाद्वै वसंस्तेषां च तृप्तये दशभिः पञ्चभिश्चैव स्वधामृतपरिस्रवैः कृष्णपक्षभुजां प्रीतिर् द्रुह्यते परमांशुभिः //
svadhāmṛtaṃ tu somādvai vasaṃsteṣāṃ ca tṛptaye daśabhiḥ pañcabhiścaiva svadhāmṛtaparisravaiḥ kṛṣṇapakṣabhujāṃ prītir druhyate paramāṃśubhiḥ //
The nectar called Svadhā indeed arises from Soma and is their sustenance, bringing satisfaction to the Pitṛs. By the flowing streams of this Svadhā-nectar—five and ten in number—the delight of those who partake during the dark fortnight is nourished by the supreme rays (of Soma).
This verse is not about Pralaya; it explains ritual cosmology: the Pitṛs are sustained by Svadhā, which is linked to Soma (the lunar principle), showing how lunar time and offerings support ancestral beings.
It supports the householder’s dharma of Śrāddha and Pitṛ-tarpaṇa: offering Svadhā in proper lunar timing (notably the kṛṣṇapakṣa) is presented as a direct means to satisfy and please the ancestors.
The significance is ritual, not architectural: Svadhā is described as Soma-born “nectar,” flowing in measured portions (five and ten), emphasizing correct quantification and timing of ancestral offerings for maximum efficacy.