Avatar of Lord Vishnu

He concept of avatar within Hinduism is most often associated with Vishnu, the preserver or sustained aspect of God within the Hindu Trinity or Trimurti or the one and only supreme God for followers of Vaishnavism.

Vishnu's avatars typically descend for a very specific purpose. An oft-quoted passage from the Bhagavad Gita describes the typical role of an avatar of Vishnu—as bringing dharma, or righteousness, back to the social and cosmic order:[1][5]

“ Whenever righteousness wanes and unrighteousness increases I send myself forth.

For the protection of the good and for the destruction of evil,

and for the establishment of righteousness,

I come into being age after age. (Gita:4.7–8)