Srimad Bhagavatam Canto 10, Chapter 12, Text 37

SB 10.12.37

etat kaumarajam karma
harer atmahi-moksanam
mrtyoh paugandake bala
drstvocur vismita vraje
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
This incident of Krsna’s saving Himself and His associates from death and of giving deliverance to Aghasura, who had assumed the form of a python, took place when Krsna was five years old. It was disclosed in Vrajabhumi after one year, as if it had taken place on that very day.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
The word moksanam means “liberation.” For the associates of Krsna and for Krsna Himself, there is no question about liberation; they are already liberated, being in the spiritual world. In the material world there are birth, death, old age and disease, but in the spiritual world there are no such things because everything is eternal. As for the python, however, by the association of Krsna and His devotees, Aghasura also achieved the same facility of eternal life. Therefore, as indicated here by the word atmahi-moksanam, if the python Aghasura could receive eternal association with the Supreme Personality of Godhead, what is to be said of those who are already associates of the Lord? Sakam vijahruh krta-punya-puñjah (Bhag. 10.12.11). Here is proof that God is good for everyone. Even when He kills someone, the one who is killed attains liberation. What then is to be said of those who are already in the association of the Lord?
Srimad Bhagavatam Canto 10, Chapter 12, Text 36
Srimad Bhagavatam Canto 10, Chapter 12, Text 39