Matsya Purana — Yadu Lineage
यदा गता न पश्यन्ति मायया संवृतं गुरुम् लक्षणं तस्य तद्बुद्ध्वा प्रतिजग्मुर्यथागतम् //
yadā gatā na paśyanti māyayā saṃvṛtaṃ gurum lakṣaṇaṃ tasya tadbuddhvā pratijagmuryathāgatam //
But when they arrived, they did not see the Guru, for he was concealed by Māyā. Recognizing the sign of that concealment, they understood it and returned the way they had come.
It highlights Māyā—the divine power that can conceal even a revered guide—suggesting that in Pralaya-era narratives, perception is not reliable unless guided by discernment (lakṣaṇa) and understanding.
It implies a practical dharma lesson: when authority or guidance is not accessible, one should read the situation’s signs, avoid rash action, and withdraw appropriately—an ethic relevant to rulers and householders alike.
No direct Vāstu/ritual rule is stated; the key technical term is lakṣaṇa (“sign/mark”), which elsewhere in Purāṇic and śilpa contexts also denotes diagnostic features—here applied to spiritual discernment rather than iconography.