The Vishnu Purana, the Brahma Purana and the Bhagavata Purana, in the episode of the killing of the demon Narakasura by Krishna avatar of Vishnu, mentions that he was the son of Varaha and the earth goddess Bhudevi. In some versions of the tale, Vishnu-Varaha promises the earth that he will not kill their son, without any consent. In Krishna form, Vishnu slays the demon with the support of Satyabhama, Krishna's consort and the avatar of Bhudevi.