Sripada srivallaba is the first known manifestation of Datta avatara.In Treta yuga maharshi Bharadwaja did severe penance for many celestial years and performed Savitru Kataka cheyana homa in Sripitikapuram in Andhra Pradesh. The Divine energy of Sri Dattatreya was existing in the form pf brilliant light beyong the space and vast emptiness. The celestial energy was pure and the brilliance was several times more than the Earthly Sun. This energy was formless. After many Celestial years this formless energy minimized its intensity and appeared in the Solar system in the form of Lord Sri Dattatreya and asked Maharshi Bharadwaja about his wish. Maharshi requested the Lord to take birth on the earth in the family of his gotram i.e Bharadwajasa gotra. Lord Dattatreya promised to do so but in Kaliyuga in the city of Sri Pitika puram.
Thus this formless energy devoid of any attributes (Nirguna Tatva) descended from a higher dimension to a very lower dimension to enable the Human beings of Kaliyuga with limited perceptions. Thus the Divine energy transformed in to the matter i.e the Human body (from unlimited to the limited form with physical and mental attributes)
Lord Dattatreya incarnated as Sripada Srivallabha in the year 1320 at Sri Pitika Pura in the family of Sri Appala Lakshmi Narasimha raja and Sowbhagyavathi Sumati Maharani.
Sripada Sri Vallabha Avatar is full of compassion and love for the suffering Humanity. He he has come down to take us to the higher dimensions.
