No One Falls From Vaikuṇṭha – Part 4 (Bhagavat Sandarbha, 51)
(2) There is no possibility of committing sin in the spiritual world. Sin and piety exist only in the material world, both being products of the guṇas of nature. A devotee in the spiritual world is situated in his eternal inherent nature (svarūpa), free from material covering or ignorance...