Matsya Purana — The Episode of Madhu and Kaiṭabha: Gunas
रजस्तमोमयावावाम् ऋषीणाम् अवलङ्घितौ छाद्यमानौ धर्मशीलौ दुस्तरौ सर्वदेहिनाम् //
rajastamomayāvāvām ṛṣīṇām avalaṅghitau chādyamānau dharmaśīlau dustarau sarvadehinām //
Made of rajas and tamas, these two are not to be overstepped even by seers; they veil those devoted to dharma and are hard to cross for all embodied beings.
Indirectly, it highlights the cosmic-psychological forces (rajas and tamas) that bind embodied beings; such binding tendencies are part of the conditioned order that persists across cycles of creation and dissolution.
It warns that even dharma-oriented people can be ‘covered’ by passion and inertia; therefore a king or householder must govern the senses, avoid rash action (rajas) and negligence (tamas), and sustain disciplined conduct to protect dharma.
No direct Vastu or ritual rule is stated; the takeaway is preparatory—ritual and sacred works succeed when rajas-tamas are restrained through purity, steadiness, and attentive practice.