Matsya Purana — Code of Conduct and Vow-Procedure for Courtesans
संसारोत्तारणायालम् एतद्वेदविदो विदुः यदा सूर्यदिने हस्तः पुष्यो याथ पुनर्वसुः //
saṃsārottāraṇāyālam etadvedavido viduḥ yadā sūryadine hastaḥ puṣyo yātha punarvasuḥ //
Those who know the Veda understand this to be fully capable of ferrying one across worldly existence: when, on a Sunday, the lunar mansion is Hasta, or Puṣya, or likewise Punarvasu.
It does not describe Pralaya directly; it teaches a practical dharma principle—right timing (Sunday with specific nakṣatras) is said to have liberating merit, metaphorically “carrying one across” saṃsāra.
It guides rulers and householders in choosing auspicious muhurta-like conditions for vows, gifts, worship, or public rites—actions believed to yield stronger dharmic results when aligned with Sunday and favorable nakṣatras.
The ritual significance is calendrical: Sunday combined with Hasta/Puṣya/Punarvasu is praised as highly efficacious. By extension, such star-day combinations are also used in Purāṇic practice for selecting auspicious times for consecrations and major rites.