Matsya Purana — Solar Dynasty Prelude: Vivasvān–Saṃjñā–Chāyā
यः करोति स पापिष्ठां गतिमाप्नोति निन्दिताम् कुष्ठरोगमवाप्नोति लोके ऽस्मिन्दुःखसंयुतः //
yaḥ karoti sa pāpiṣṭhāṃ gatimāpnoti ninditām kuṣṭharogamavāpnoti loke 'sminduḥkhasaṃyutaḥ //
Whoever commits such an act attains a most sinful and condemned fate; in this very world he incurs leprosy (kuṣṭha) and lives bound to suffering.
This verse is not about pralaya; it teaches karmaphala—how unethical actions bring immediate worldly suffering and a condemned post-mortem destiny.
It warns rulers and householders that adharma has tangible social and bodily consequences; maintaining justice, self-restraint, and moral conduct prevents both personal suffering and societal disorder.
No vastu or temple-building rule is stated here; the focus is ethical causality—wrongdoing leads to disease and disgrace rather than ritual/architectural procedure.