Matsya Purana — The Episode of Madhu and Kaiṭabha: Gunas
तौ रजस्तमसौ विष्णोः सम्भूतौ तामसौ गणौ एकार्णवे जगत्सर्वं क्षोभयन्तौ महाबलौ //
tau rajastamasau viṣṇoḥ sambhūtau tāmasau gaṇau ekārṇave jagatsarvaṃ kṣobhayantau mahābalau //
Those two—Rajas and Tamas—born from Viṣṇu, a pair of dark (tāmasic) mighty beings, were powerfully agitating the entire universe within the single, all-engulfing ocean (of dissolution).
It depicts pralaya as a state where the universe becomes an ‘ekārṇava’ (one ocean), and the guṇic forces—especially rājasic agitation and tāmasic obscuration—violently churn that dissolution-state.
Indirectly, it frames ethical life as guṇa-management: kings and householders are urged elsewhere in the Matsya Purāṇa to restrain tamas (confusion, negligence) and rajas (uncontrolled passion) through dharma, discipline, and sattvic conduct—mirroring how cosmic disorder arises when these forces dominate.
No direct Vāstu or ritual rule is stated; however, the image of ‘churning disturbance’ in the cosmic waters is often used in Purāṇic thought to contrast with the stabilizing aim of ritual order and Vāstu-alignment (establishing steadiness against chaos).