Matsya Purana — The Pushkara Manifestation
काला तु वै कालकेयान् असुरान्सुरसा तु वै अनायुषायास्तनया व्याधयः सुमहाबलाः //
kālā tu vai kālakeyān asurānsurasā tu vai anāyuṣāyāstanayā vyādhayaḥ sumahābalāḥ //
Kālā, indeed, gave birth to the Kālakeya Asuras; and Surasā, indeed, bore (the beings of) short life—mighty Diseases, her sons.
It reflects creation-side cosmology: even destructive forces (Asuras) and human afflictions (diseases, short lifespan) are presented as structured offspring within the cosmic order, not random chaos.
By framing disease and short lifespan as powerful realities in the world, it implicitly supports dharmic duties: rulers must protect public health and order, while householders should follow disciplined living, charity, and ritual observances to mitigate suffering.
No direct Vastu or temple-building rule is stated; ritually, the verse underlines why Purāṇic traditions emphasize protective rites, healing observances, and longevity practices to counter ‘Vyādhi’ and ‘Anāyuṣā’.