Matsya Purana — Paurava Genealogy
तेभ्यो ऽपरे ऽपि ये त्व् अन्ये ह्य् उत्पत्स्यन्ते नृपाः पुनः क्षत्राः पारशवाः शूद्रास् तथान्ये ये बहिश्चराः //
tebhyo 'pare 'pi ye tv anye hy utpatsyante nṛpāḥ punaḥ kṣatrāḥ pāraśavāḥ śūdrās tathānye ye bahiścarāḥ //
And from them, yet others will again arise as kings—Kṣatriyas, Pāraśavas, Śūdras, and also other rulers who live outside the established social order.
This verse is not about pralaya; it belongs to the dynastic-prophetic material, stating that future kings will arise from varied social origins, including groups outside the standard order.
Indirectly, it frames kingship as historically arising from multiple social strata; in the Matsya Purana’s broader rajadharma context, such rulers are still expected to uphold order, protection, and justice regardless of origin.
None is stated here; the verse is genealogical/prophetic rather than about Vastu Shastra, temple rules, or ritual procedure.