Matsya Purana — Dynastic Genealogies: Paurava–Anu Lines
ऋष्यशृङ्गप्रसादेन जज्ञे स्वकुलवर्धनः चतुरङ्गस्य पुत्रस्तु पृथुलाक्ष इति स्मृतः //
ṛṣyaśṛṅgaprasādena jajñe svakulavardhanaḥ caturaṅgasya putrastu pṛthulākṣa iti smṛtaḥ //
By the grace of Ṛṣyaśṛṅga there was born Svakulavardhana, the increaser of his own lineage. And the son of Caturaṅga is remembered as Pṛthulākṣa.
Nothing directly about Pralaya is stated here; the verse functions as a genealogical record, emphasizing birth through a sage’s grace and the succession of kings.
Indirectly, it highlights the ideal of kula-vardhana—upholding and strengthening one’s lineage—an expected royal/householder responsibility in Purāṇic ethics through righteous conduct and continuity.
No Vāstu or temple-architecture rule is mentioned; the only ritual implication is the motif of ‘prasāda’ (grace) from a ṛṣi as a legitimizing force behind birth and dynastic continuity.