Śrī brahma-saṁhitā 5.54
karmāṇi nirdahati kintu ca bhakti-bhājāṁ
govindam ādi-puruṣaṁ tam ahaṁ bhajāmi
yaḥ — He who (Govinda); tu — but; indra-gopam — to the small red insect called indragopa; atha vā — or even; indram — to Indra, king of heaven; aho — oh; sva-karma — of one's own fruitive activities; bandha — bondage; anurūpa — according to; phala — of reactions; bhājanam — enjoying or suffering; ātanoti — bestows; karmāṇi — all fruitive activities and their reactions; nirdahati — destroys; kintu — but; ca — also; bhakti-bhājām — of persons engaged in devotional service; govindam — Govinda; ādi-puruṣam — the original person; tam — Him; aham — I; bhajāmi — worship.
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 sannyāsa is also a sort of karma befitting an āśrama and is not pleasant to Kṛṣṇa 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 ātma-mamatā, i.e., self-pleasure; but those who are pure devotees always serve Kṛṣṇa by gratifying His senses forsaking all attempts of karma and jñāna, and being free from all desires save that of serving Kṛṣṇa. Kṛṣṇa has fully destroyed the karma, its desires and nescience of those devotees. It is a great wonder that Kṛṣṇa, being impartial, is fully partial to His devotees.