Matsyapurana 172.5

172.5

aditerapi putratvam eva yāti yuge yuge
eṣa viṣṇuriti khyāta indrasyāvarajo vibhuḥ //

The mystic Viṣṇu is known as Nârâyaṇa through discernable manifestation He is also called Anant-âtmâ and Avinâśi Prabhu When the eternal Hari became engaged in the form of Nârâyaṇa in creation, He manifested Himself as Brahmâ, Vâyu, Soma, Indra, Dharma, Bṛihaspati, Śukra etc., Viṣṇu was also born as the son of Aditi in consequence of which He is also called Upendra, the younger brother of Indra, He manifested Himself to destroy the enemies of the Devas such as the demons, the Daityas, the Râkṣasas—3-6