No One Falls From Vaikuṇṭha – Part 5 (Bhagavat Sandarbha, 51)
(4 and 5) A perfected devotee never commits an offense. Offenses are committed due to ignorance, resulting from forgetfulness of the Lord. Offense (aparādha) means an act that causes displeasure. A siddha devotee never forgets the Lord, and he never desires to displease the Lord; he thus never commits offenses, knowingly or unknowingly.