PURPORT

There have been many instances in which demons or nondevotees have attempted to kill a devotee, but they have never been able to destroy a great devotee of the Supreme Personality of Godhead. The Lord promises in Bhagavad-gita (9.31), kaunteya pratijanihi na me bhaktah pranasyati. This is a declaration by the Supreme Personality of Godhead that His devotee cannot be killed by demons. Prahlada Maharaja is the vivid example of the truth of this promise. Narada Muni told the King of heaven, "It would be impossible for you to kill the child, even though you are demigods, and certainly it would be impossible for others."