Matsya Purana — Solar Dynasty Prelude: Vivasvān–Saṃjñā–Chāyā
पृथक्चकार तत्तेजश् चक्रं विष्णोर् अकल्पयत् त्रिशूलं चापि रुद्रस्य वज्रमिन्द्रस्य चाधिकम् //
pṛthakcakāra tattejaś cakraṃ viṣṇor akalpayat triśūlaṃ cāpi rudrasya vajramindrasya cādhikam //
He then differentiated that radiant power and fashioned from it Viṣṇu’s discus (cakra), Rudra’s trident (triśūla), and also Indra’s supreme thunderbolt (vajra).
It highlights a creation-side principle: a single cosmic tejas (radiant potency) is differentiated into specific divine powers and emblems, showing how order and function arise from undivided energy.
By presenting the vajra, cakra, and triśūla as ordained powers of governance and protection, it indirectly models righteous rule: authority should be structured, differentiated, and used to uphold dharma rather than as undirected force.
These are key ayudhas (emblems) used in pratima-lakṣaṇa (iconographic specification): temples and rituals depict Vishnu with the cakra, Rudra with the triśūla, and Indra with the vajra, ensuring doctrinally correct imagery and worship.