The first Manu was Swayambhuva Manu. He had three daughters, namely Akuti, Devahuti and Prasuti. Devahuti was given in marriage to sage Kardama and she gave birth to nine daughters, and a single son named Kapila. Prasuti gave birth to Yajna and Akuti gave birth to one son and one daughter. Both Kapila and Yajna, who were sons of Devahuti and Prasuti respectively, were incarnations of Vishnu. Svayambhuva Manu, along with his wife, Satarupa, went into the forest to practice austerities on the bank of the River Sunanda. At some point in time, Rakshasas attacked them, but Yajna, accompanied by his sons, the demigods, swiftly killed them. Then Yajna personally took the post of Indra, the King of the heavenly planets.