As per Hindu legend, once there was an argument between Saraswathi, the consort of Brahma and Lakshmi on superiority. They went to Indra, the king of celestial deities. Indra judged Lakshmi as superior and not satisfied with his argument, Saraswathi went to her husband, Brahma. He also chose Lakshmi to be the superior one. Saraswathi was unhappy with the decision and decided to stay away from Brahma. Brahma did a severe penance praying to Vishnu and did an Aswametha Yagna. Saraswathi was still angry that the yagna, which usually is done along with consorts was done alone by Brahma. She tried to disrupt the penance, but Vishnu interfered. Another version of the legend states that Saraswathi sent raakshakas to spoil the penance, which was spoiled by the stream of light from Vishnu. Since Vishnu appeared as light to overcome the darkness of the situation, he was termed Deepaprakasa Perumal.