God Vishnu is being referred to as “the unconquerable preserver”. By the time of the epics, Lord Vishnu is not only the great preserver of every part of the universe including the sun but the Puranas even call him the creator, thus usurping the role of Brahma.
Lord Vishnu‘s mythology is given in the greatest detail in the Vishnu, Vayu, and Bhagavad Puranas and the stories of his two most important avatars, Lord Rama and Lord Krishna, are given in the epics. The history of God Rama of Ayodhya is told in the Ramayana.
The exploits of God Krishna of Dwarka are found in the Mahabharata and in the Harivamsa, which is a supplement of the epic. The Mahabharata also contains the Bhagavad Gita which is by far the most important religious text in Hinduism and contains the teachings of Krishna about the correct path of life and the attainment of salvation. For millions of Hindus, the Bhagavad Gita is at the heart of their philosophy of life and a source of guidance, enlightenment and solace.

The Trimurti (English: ‘three forms’) is a concept in Hinduism “in which the cosmic functions of creation, maintenance, and destruction are personified by the forms of Brahma the creator, Vishnu the maintainer or preserver, and Shiva the destroyer or transformer.”These three deities have been called “the Hindu triad”or the “Great Trinity”.
Lord Vishnu is called Upendra because he appeared in the family of Aditi (Indra’s mother) in one of His incarnations, Vamana….
[...] Chandr Ji, the 7th incarnation of Vishnu Ji, is the hero of this tale which, according to Hindu mythology, took place near the end of [...]
[...] their portions to Sumitra and in turn the queens gave birth to four princes, Kausalya to the eldest Rama, Kaikeyi to the second Bharat, and Sumitra having gotten two shares, to younger Laxman and [...]