Shri Shri Bhrahma Samhita Verse 54.
I adore the primeval Lord Govinda, who burns up to their roots all fruitive activities of those who are imbued with devotion and impartially ordains for each the due enjoyment of the fruits of one's activities, of all those who walk
in the path of work, in accordance with the chain of their previously performed works, no less in the case of the tiny insect that bears the name of indragopa than in that of Indra, king of the devas.
God impartially induces the fallen souls to act in the way that is consequent on the deeds of their previous births and to enjoy the fruition of their labors but, out of His great mercy to His devotees, He purges out, by the fire of
ordeal, the root of all karma, viz., nescience and evil desires. Karma, though without beginning, is still perishable. The karma of those, who work with the hope of enjoying the fruits of their labors, becomes everlasting and endless and is never destroyed. The function of sannyasa is also a sort of karma befitting an asrama and is not pleasant to Krsna when it aims at liberation, i.e., desire for emancipation. They also receive fruition of their karma and, even if it be disinterested, their karma ends in atma-mamata, i.e., self-pleasure; but those who are pure devotees always serve Krsna by gratifying His senses forsaking all attempts of karma and jnana, and being free from all desires save that of serving Krsna. Krsna has fully destroyed the karma, its desires and nescience of those devotees. It is a great wonder that Krsna, being impartial, is fully partial to His devotees.