By Swami Harshananda
Lord Viṣṇu's duty it is to take care of the world after its creation. He incarnates himself to balance whenever dharma (righteousness) declines and adharma (unrighteousness) gets the upper hand.
Out of the ten avatāras or such incarnations generally known as ‘Daśāvatāras’, Kalki is the last. It is yet to come. He is said to appear at the end of the Kaliyuga as the son of Viṣṇuśarma and Sumati in the city of Sambalāpura. He will finish his education under Paraśurāma and please Parameśvara by his tapas. Through this he will obtain a divine sword and a steed from Him. Then he will kill Kali in a combat and free the world from his unrighteous rule. In this incarnation, Padmāvatī, the princess of Sirihala will be his queen.
- The Concise Encyclopedia of Hinduism, Swami Harshananda, Ram Krishna Math, Bangalore