Matsya Purana — The Episode of Madhu and Kaiṭabha: Gunas
एह्यागच्छावयोर् युद्धं देहि त्वं कमलोद्भव आवाभ्यां परमीशाभ्याम् अशक्तस्त्वमिहार्णवे //
ehyāgacchāvayor yuddhaṃ dehi tvaṃ kamalodbhava āvābhyāṃ paramīśābhyām aśaktastvamihārṇave //
“Come—approach and grant us battle, O Lotus-born (Brahmā)! For you are powerless here in this ocean before us two, the supreme lords.”
It situates the scene in the arṇava (cosmic ocean), a hallmark of Pralaya imagery, where ordinary cosmic authority (even Brahmā) is portrayed as constrained within dissolution-waters.
Indirectly, it reinforces a Purāṇic ethic: worldly power is contingent, so kings and householders should ground duty (dharma) in humility and reliance on the highest divine order rather than pride in office.
No direct Vāstu or ritual procedure is stated; the key takeaway is theological—cosmic hierarchy during Pralaya—useful for contextual cross-linking rather than extracting temple-building rules.