Puranic Encyclopaedia: A Comprehensive Dictionary with Special Reference to the Epic and Puranic Literature c7.1923

c7.1923

Once when the wife of Ugrasena was in her menses she went to the garden with her companions. Then a Gandharva named Dramila disguised as Ugrasena went to her but she knew the trick and cursed him that he would go to hell. But Dramila committed rape on her and then left the place making her pregnant. When the child was born Ugrasena’s wife greatly hated the child got of an evil deed and cursed it saying that the child would be killed by a member of the family of Ugrasena. Thus Kaṃsa was the son born to the wife of Ugrasena by the Gandharva, Dramila. It was because Kaṃsa was aware of it that he behaved very badly to Ugrasena and Kṛṣṇa. (10th Skandha, Bhāgavata).