Matsya Purana — The Episode of Madhu and Kaiṭabha: Gunas
ततो भूतानि जायन्ते सात्त्विकानीतराणि च स एव हि युवां नांशे वशी देवो हनिष्यति //
tato bhūtāni jāyante sāttvikānītarāṇi ca sa eva hi yuvāṃ nāṃśe vaśī devo haniṣyati //
From that (source) beings are born—those of the sattva-type as well as the others. Indeed, that very Lord, the self-controlled God, will destroy you both when you are without a share (of His grace/power).
It states that all beings arise from a prior cause and are differentiated by guṇas (sattva and the others), while ultimate destruction remains under the sovereign Lord’s control.
By implying that character and conduct vary by guṇa, it encourages rulers and householders to cultivate sattva—self-control, clarity, and dharmic restraint—knowing that power and survival are not autonomous but dependent on the Lord’s sanction.
No direct vastu/ritual rule is given; the takeaway is theological: ritual and temple acts are meaningful when aligned with sattva and devotion to the sovereign Lord who governs creation and dissolution.