Srimad Bhagavatam Canto 10, Chapter 26, Text 21

SB 10.26.21

ya etasmin maha-bhage
 pritim kurvanti manavah
narayo ’bhibhavanty etan
 visnu-paksan ivasurah
 
Translation: 
 
Demons cannot harm the demigods, who always have Lord Visnu on their side. Similarly, any person or group attached to all-auspicious Krsna cannot be defeated by enemies.
 
Purport: 
 
Srila Prabhupada has especially indicated in this connection that just as Lord Krsna’s associates could not be defeated by Kamsa, so His modern-day devotees will not be defeated by their demoniac opponents, nor will the Lord’s devotees be defeated by the internal enemies — the lusty, materialistic senses.
Srimad Bhagavatam Canto 10, Chapter 26, Text 20
Srimad Bhagavatam Canto 10, Chapter 26, Text 22