Matsya Purana — Soma
इत्येते पितरो देवाः सोमपाः सोमवर्धनाः आर्तवा ऋतवो ऽथाब्दा देवास्तान्भावयन्ति हि //
ityete pitaro devāḥ somapāḥ somavardhanāḥ ārtavā ṛtavo 'thābdā devāstānbhāvayanti hi //
Thus these Pitṛs are indeed divine—drinkers of Soma and increasers of Soma. They are bound to the seasons and the yearly cycle; and the gods, in truth, sustain and foster them.
It does not describe Pralaya directly; it presents a ritual-cosmic order in which Pitṛs are sustained through Soma and the cycles of seasons and years—an ongoing maintenance of cosmic continuity rather than dissolution.
It supports the householder’s duty to maintain Pitṛ-yajña (Śrāddha and offerings), implying that proper Soma-linked rites aligned with calendrical cycles sustain the ancestors, which is a key component of dharma for householders (and upheld by kings through social-religious order).
The significance is ritual rather than architectural: the verse ties ancestor-nourishment to Soma and to seasonal/annual timing, highlighting the importance of performing Śrāddha and related offerings in harmony with ṛtu (season) and abda (year) observances.