Srimad Bhagavatam Canto 04, Chapter 10, Text 04

SB 4.10.4

dhruvo bhratr-vadham srutva
kopamarsa-sucarpitah
jaitram syandanam asthaya
gatah punya-janalayam
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
 
When Dhruva Maharaja heard of the killing of his brother Uttama by the Yaksas in the Himalaya Mountains, being overwhelmed with lamentation and anger, he got on his chariot and went out for victory over the city of the Yaksas, Alakapuri.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
 
Dhruva Maharaja’s becoming angry, overwhelmed with grief, and envious of the enemies was not incompatible with his position as a great devotee. It is a misunderstanding that a devotee should not be angry, envious or overwhelmed by lamentation. Dhruva Maharaja was the king, and when his brother was unceremoniously killed, it was his duty to take revenge against the Yaksas from the Himalayas.
 
Srimad Bhagavatam Canto 04, Chapter 10, Text 03
Srimad Bhagavatam Canto 04, Chapter 10, Text 05