Srimad Bhagavatam: Canto 04, Chapter 13 – Description of the Descendants of Dhruva Maharaja

10. The son Vena thus born was a greatly irreligious person because

a)   The demigods were not happy with King Anga
b)   The boy greatly inherited from his maternal family and his maternal grandfather was death personified
c)   King Anga did not properly honor the preparation given to him as a result of the sacrifice
d)   The king offended Lord Vishnu