Matsya Purana — Division of Bhārata-varṣa
न जरा बाधते तत्र तेन जीवन्ति ते चिरम् एकादश सहस्राणि तेषामायुः प्रकीर्तितम् //
na jarā bādhate tatra tena jīvanti te ciram ekādaśa sahasrāṇi teṣāmāyuḥ prakīrtitam //
There, old age does not afflict them; therefore they live for a long time. Their lifespan is declared to be eleven thousand years.
Indirectly, it contrasts mortal decay with realms or conditions where dissolution through aging (jarā) does not operate—highlighting that not all planes are equally subject to the same modes of decline, even though cosmic pralaya ultimately encompasses all.
By emphasizing that longevity depends on freedom from affliction, it supports the Matsya Purana’s ethical thrust: rulers and householders should foster health, order, and dharma (right living), since a well-governed, disciplined life is portrayed as the foundation for long, stable living.
No direct Vastu or ritual rule is stated; the takeaway is thematic—properly maintained sacred spaces and dharmic order are traditionally associated with reduced “affliction” and enhanced well-being, which later Vastu and ritual sections frame as a goal of correct construction and worship.