According to mythological tales, Narakasura was a mighty demon king who ruled over the Earth. He was born from Bhudevi, the goddess of the Earth, and Varaha, a boar form of Lord Vishnu. As Narakasura grew up, he started to pray to Lord Brahma and requested a boon that he be killed only by the hands of his mother. Lord Brahma granted him this request. Flushed with power, Narakasura became arrogant and wicked and used his power to harm the gods and humans; he would kidnap girls and torture them. The captives and the villagers prayed to Lord Krishna to help free them from the demon. Thus, Krishna and his spouse Satyabhama—an avatar of Bhudevi—killed Narakasura, fulfilling the boon that he had requested from Brahma and freeing the villagers from his bane. The tales further state that after Krishna released all the kidnapped women, they lit a series of oil lamps in celebration.