Matsya Purana — Code of Conduct and Vow-Procedure for Courtesans
आदिष्टो ऽसि पुरा ब्रह्मन् केशवेन च धीमता कस्मादीशेन संयोगं प्राप्य वेश्यात्वमागताः //
ādiṣṭo 'si purā brahman keśavena ca dhīmatā kasmādīśena saṃyogaṃ prāpya veśyātvamāgatāḥ //
O Brahmin, you were formerly instructed by the wise Keśava. For what reason, after coming into union with the Lord (Īśa), did you (or they) come to the state of a courtesan?
This verse does not discuss pralaya or cosmology; it is a narrative-ethical inquiry focused on causation (kasmāt) behind a fall into veśyātvam despite prior instruction by Keśava.
Indirectly, it highlights Purāṇic moral logic: status and social condition are explained through prior causes (instruction, association, and consequences). For rulers/householders, it reinforces vigilance in conduct and associations, since outcomes are portrayed as karmically intelligible and ethically charged.
No Vāstu, temple-building, iconographic, or ritual procedure is mentioned in this verse; it belongs to a narrative exchange about cause, association (saṃyoga), and social condition (veśyātvam).