Matsya Purana — Genealogy of the Śūra–Vasudeva
श्रद्धादेव्या विहारे तु वने हि विचरन्पुरा वैश्यायामदधाच्छौरिः पुत्रं कौशिकमग्रजम् //
śraddhādevyā vihāre tu vane hi vicaranpurā vaiśyāyāmadadhācchauriḥ putraṃ kauśikamagrajam //
Formerly, while roaming in a forest pleasure-grove together with Śraddhādevī, Śauri begot—upon a Vaiśyā woman—his elder son named Kauśika.
This verse does not address Pralaya; it is part of a genealogical narration describing the birth of Kauśika to Śauri.
Indirectly, it reflects the Purāṇic emphasis on lineage and progeny (praja), where a ruler’s succession and family line are treated as socially and politically consequential.
No Vāstu, temple-building, or ritual procedure is mentioned; the verse is purely genealogical, naming persons and describing a birth in a forest recreation setting.