Srimad Bhagavatam Canto 11, Chapter 05, Text 17

SB 11.5.17

eta atma-hano ’santa
 ajñane jñana-maninah
sidanty akrta-krtya vai
 kala-dhvasta-manorathah
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
The killers of the soul are never peaceful, because they consider that human intelligence is ultimately meant for expanding material life. Thus neglecting their real, spiritual duties, they are always in distress. They are filled with great hopes and dreams, but unfortunately these are always destroyed by the inevitable march of time.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
There is a similar verse in Sri Isopanisad (3):
 
asurya nama te loka
 andhena tamasavrtah
tams te pretyabhigacchanti
 ye ke catma-hano janah
 
“The killer of the soul, whoever he may be, must enter into the planets known as the worlds of the faithless, full of darkness and ignorance.”
Srimad Bhagavatam Canto 11, Chapter 05, Text 16
Srimad Bhagavatam Canto 11, Chapter 05, Text 18