Srimad Bhagavatam Canto 10, Chapter 51, Text 15

SB 10.51.15

sa yacitah sura-ganair
 indradyair atma-raksane
asurebhyah paritrastais
 tad-raksam so ’karoc ciram
 
Translation: 
 
Begged by Indra and the other demigods to help protect them when they were terrorized by the demons, Mucukunda defended them for a long time.
Srimad Bhagavatam Canto 10, Chapter 51, Text 14
Srimad Bhagavatam Canto 10, Chapter 51, Text 16