Matsya Purana — Solar–Lunar Motions
भ्रूणहत्याश्वमेधादिपापपुण्यनिभैः परम् आभूतसम्प्लवान्ते तु क्षीयन्ते चोर्ध्वरेतसः //
bhrūṇahatyāśvamedhādipāpapuṇyanibhaiḥ param ābhūtasamplavānte tu kṣīyante cordhvaretasaḥ //
At the end of the great dissolution of the elements (ābhūta-sampplava), even the ūrdhvaretas ascetics—those of restrained seed and upward-directed vital force—are exhausted; and with them perish the residual fruits that resemble both the gravest sin (such as embryo-slaying) and the highest merit (such as the Aśvamedha sacrifice).
It teaches that at the close of elemental dissolution (ābhūta-samplava), karmic residues—both extreme sin and extreme merit—lose their operative force; even exalted ascetic attainments are subject to cosmic exhaustion.
It reframes royal and household dharma (sacrifices like Aśvamedha, avoidance of great sins) as powerful but ultimately time-bound within cosmic cycles—encouraging righteous action without pride and with awareness of impermanence.
Ritually, it references Aśvamedha as the pinnacle of sacrificial merit, but emphasizes that even such ritual fruits are not permanent at Pralaya; no specific Vastu or temple-building rule is stated in this verse.