Srimad Bhagavatam Canto 08, Chapter 11, Text 28

SB 8.11.28

sa tenaivasta-dharena
 sirasi bala-pakayoh
jñatinam pasyatam rajañ
 jahara janayan bhayam
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
O King Pariksit, King Indra used his thunderbolt to cut off the heads of both Bala and Paka in the presence of all their relatives and followers. In this way he created a very fearful atmosphere on the battlefield.
Srimad Bhagavatam Canto 08, Chapter 11, Text 27
Srimad Bhagavatam Canto 08, Chapter 11, Text 29